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工程
家用
QDX潜水电泵产品概述
QDX型潜水电泵（以下简称电泵）由水泵、密封、电动机三部分组成。电动机位于电泵上部，内配有热保护器装置，为单相或三相异步电动机。水泵位于电泵下部，为离心式叶轮、蜗壳结构，水泵与电机之间采用双端面机械密封。各固定止口采用“o”型耐油橡胶密封圈作静密封。整体结构紧凑，运行平稳。浮球开关可以根据所需液位变化而自动控制电泵的起动和停止，是一种节能高效的理想电泵。
QDX潜水电泵产品用途
该系列电泵由于体积小、重量轻，特别适用于广大农村井下抽水、农田排灌、园林浇灌、家庭生活用水，也可用于排除工业积水、建筑施工给排水及养殖业等。
QDX潜水电泵使用条件
1) 工作介质无腐蚀性的清水，介质中含砂量的体积比不过0.10%，粒度不大于0.2omm。
2) 介质温度不过40℃，介质的ph值在6.5-8.5之间。
3) 电泵应在额定扬程附近的使用范围内使用。并且完全浸入水中，潜水深度不宜过3m，深不过5m。
4) 电泵离水底0.5m以上，但不可陷入泥中。否则会引起爆炸。
5) 电源频率为50hz，电压三相为38ov，波动范围为额定值的0.9-1.1倍。
6)潜水深度不过5m
QDX潜水电泵(家用)型号及参数
| 产 品 型 号 | 流量 | 扬程 | 功率 | 电流 | 配管 | 电压 | 转速 | 频率 | |
| (m3/h) | (m） | （kw） | （a） | (寸) | (mm) | (v) | (r/min) | (hz) | |
| QDX370W(家用) | 1.5 | 9 | 0.37 | 2.8 | 1 | 25 | 220 | 2860 | 50 |
| QDX750W(家用) | 1.5 | 15 | 0.75 | 5.2 | 1 | 25 | 220 | 2860 | 50 |
QDX潜水电泵(工程用)型号及参数
| 型号 | 电压（v） | 功率（w） | 额定流量（m3/h) | 额定扬程（m） | 出口直径（寸） |
| QDX1.5-16-0.37A | 220V/50HZ | 370 | 1.5 | 16 | 1 |
| QDX6-10-0.37A | 220V/50HZ | 370 | 6 | 10 | 1.5 |
| QDX3-20-0.5 | 220V/50HZ | 550 | 3 | 20 | 1 |
| QDX10-10-0.5 | 220V/50HZ | 550 | 10 | 10 | 1.5 |
| QDX15-7-0.5 | 220V/50HZ | 550 | 15 | 7 | 2 |
| QDX1.5-32-0.7 | 220V/50HZ | 750 | 1.5 | 32 | 1 |
| QDX7-18-0.7 | 220V/50HZ | 750 | 7 | 18 | 1.5 |
| QDX10-16-0.7 | 220V/50HZ | 750 | 10 | 16 | 2 |
| QDX15-10-0.7 | 220V/50HZ | 750 | 15 | 10 | 2.5 |
| QDX30-6-0.7 | 220V/50HZ | 750 | 30 | 6 | 3 |
| QDX6-26-1.1A | 220V/50HZ | 1100 | 6 | 26 | 1.5 |
| QDX15-15-1.1A | 220V/50HZ | 1100 | 15 | 15 | 2/2.5 |
| QDX40-7-1.1A | 220V/50HZ | 1100 | 40 | 7 | 3 |
| QDX18-18-1. | 220V/50HZ | 1500 | 18 | 18 | 2 |
| QDX40-9-1. | 220V/50HZ | 1500 | 40 | 9 | 3 |
木箱、泡沫或纸箱包装，因每个型号重量不同对应运费不同，如果重多我们会联系您补运费。
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... know you would not mind,’ said Agnes, coming to me, and
speaking in a low voice, so full of sweet and hopeful consideration
that I hear it now, ‘the duties of a secretary.’
‘Mind, my dear Agnes?’
‘Because,’ continued Agnes, ‘Doctor Strong has acted on his
intention of retiring, and has come to live in London; and he asked
papa, I know, if he could recommend him one. Don’t you think he
would rather have his favourite old pupil near him, than anybody
else?’
‘Dear Agnes!’ said I. ‘What should I do without you! You are
always my good angel. I told you so. I never think of you in any
other light.’
Agnes answered with her pleasant laugh, that one good Angel
(meaning Dora) was enough; and went on to remind me that the
Doctor had been used to occupy himself in his study, early in the
morning, and in the evening―and that probably my leisure would
suit his requirements very well. I was scarcely more delighted with
the prospect of earning my own bread, than with the hope of
earning it under my old master; in short, acting on the advice of
Agnes, I sat down and wrote a letter to the Doctor, stating my
object, and appointing to call on him next day at ten in the
forenoon. This I addressed to Highgate―for in that place, so
memorable to me, he lived―and went and posted, myself, without
Charles Dickens ElecBook Classics
David Copperfield
losing a minute.
Wherever Agnes was, some agreeable token of her noiseless
presence seemed inseparable from the place. When I came back, I
found my aunt’s birds hanging, just as they had hung so long in
the parlour window of the cottage; and my easy-chair imitating my
aunt’s much easier chair in its position at the open window; and
even the round green fan, which my aunt had brought away with
her, screwed on to the window-sill. I knew who had done all this,
by its seeming to have quietly done itself; and I should have
known in a moment who had arranged my neglected books in the
old order of my school days, even if I had supposed Agnes to be
miles away, instead of seeing her busy with them, and smiling at
the disorder into which they had fallen.
My aunt was quite gracious on the subject of the Thames (it
really did look very well with the sun upon it, though not like the
sea before the cottage), but she could not relent towards the
London smoke, which, she said, ‘peppered everything’. A complete
revolution, in which Peggotty bore a prominent part, was being
effected in every corner of my rooms, in regard of this pepper; and
I was looking on, thinking how little even Peggotty seemed to do
with a good deal of bustle, and how much Agnes did without any
bustle at all, when a knock came at the door.
‘I think,’ said Agnes, turning pale, ‘it’s papa. He promised me
that he would come.’
I opened the door, and admitted, not only Mr. Wickfield, but
Uriah Heep. I had not seen Mr. Wickfield for some time. I was
prepared for a great change in him, after what I had heard from
Agnes, but his appearance shocked me.
It was not that he looked many years older, though still dressed
Charles Dickens ElecBook Classics
David Copperfield
with the old scrupulous cleanliness; or that there was an
unwholesome ruddiness upon his face; or that his eyes were full
and bloodshot; or that there was a nervous trembling in his hand,
the cause of which I knew, and had for some years seen at work. It
was not that he had lost his good looks, or his old bearing of a
gentleman―for that he had not―but the thing that struck me
most, was, that with the evidences of his native superiority still
upon him, he should submit himself to that crawling
impersonation of meanness, Uriah Heep. The reversal of the two
natures, in their relative positions, Uriah’s of power and Mr.
Wickfield’s of dependence, was a sight more painful to me than I
can express. If I had seen an Ape taking command of a Man, I
should hardly have thought it a more degrading spectacle.
He appeared to be only too conscious of it himself. When he
came in, he stood still; and with his head bowed, as if he felt it.
This was only for a moment; for Agnes softly said to him, ‘Papa!
Here is Miss Trotwood―and Trotwood, whom you have not seen
for a long while!’ and then he approached, and constrainedly gave
my aunt his hand, and shook hands more cordially with me. In the
moment’s pause I speak of, I saw Uriah’s countenance form itself
into a most ill-favoured smile. Agnes saw it too, I think, for she
shrank from him.
What my aunt saw, or did not see, I defy the science of
...总装机容量为125万千瓦，相当於目前苏丹各类电站总装机容量的两倍多矿用潜水电泵 单向潜水电泵 qdx3-20-0.55a 周该大坝是迄今非洲大的水坝工程，其土建部分总造价为5.55亿欧元矿用潜水电泵 单向潜水电泵 qdx3-20-0.55a 周水利水电工程总公司与水利电力对外公司组成的投标联营体成为该项目土建工程的中标实体。这是截止目前企业对外承包工程中单项合同金额高的一个项目。麦洛维大坝工程规模庞大、技术复杂、投资巨大，从各个方面来说都是具挑战性的工程。为此，施工单位十分注重工程机械装备的技术与质量。水电七局为三一的老客户。该局负责人表示，经过多年使用三一泵送设备，对三一产品有足够信心。此次承担的工程项目施工难度和要求都很高，我们看正的是三级配混凝土输送泵优于设备的特点。据悉，三级配混凝土输送泵是三一重工专为三级配混凝土泵送而设计的新一代泵送产品，具有设备入场安装方便、安装周期短、布料半径大、浇筑速度快等特点。该产品的研制成功，填补了。三级配混凝土输送是“十五”重大技术装备研制项目，于2003年正式投放市场，目前正在三峡水电站、西电东送等建设工程中发挥着重大的作用。
从钢价回落中审视钢铁业发展之路
随着市场需求的旺盛，钢铁业从冷门走向热门。但在经历了三四年疯狂增长之后。钢铁行业所存在的行业集中度低、生产布局不合理、产品结构矛盾等问题不没有得到解决，一定程度上还日趋严重。如同谁也没有想到今年4月钢铁产品的价格会有如此大幅地下降，业内人士大多跌破眼镜。在上海市场，热卷板价格从3月份高的每吨5500元下降至目前的3700元，冷轧板价格从每吨7000元下降到5000元，螺纹钢价格从每吨3600元跌至2800元。格的回落给了钢铁企业“自省吾身”的压力。同时于本月出台的《钢铁产业发展政策》更意味着产业调整和重组阵痛的逼近。钢材价格怎么了?钢铁行业怎么走?价格风向标下游行业需求减缓．是钢价下降的直接原因。从统计的数字来看，钢材主要下游行业，即建筑、机械、汽车、家电和造船业，在今年3月、4月或者是更早，其增速巳明显减缓。表现明显的是汽车、机械和家电行业，汽车行业从今年1月开始与去年同比几乎没有增长，甚至出现负增长；机械产品的增长率也从去年高时的50％下降到目前的10％左右；家电行业的增长已从高40％的增长速度回落到如今的20％左右。下游已在“刹车”，但由于前两年的疯狂投资，钢铁产业本身的产能依然在不断扩大。数据显示，从2003年到2004年，钢铁行业投资力度大，投资总额在3000亿元以上。其中2003年钢铁业投资同比增长了200％左右。我国钢材产量从1996年突破1亿吨后到2003年突破2亿吨，只用了7年时间。而今年预计将突破3亿吨，新的1亿吨增量耗时两年。据悉，今年前五个月，钢材产量已1．43亿吨，同比增长了25．45％。随着前两年投资在2005年5月之后陆续达产，预计今年钢材产量将3．5亿吨一3．6亿吨。如此一来，供大于求的局面必然产生，格从今年4月份开始大幅度下跌也势在必然。V型转折背后与世界钢铁业的波动相比，钢铁格的起伏总是呈现V字型．而不是相对平缓的波浪型。换句话说，是每转折，不管是从降至升还是从升转降，变化幅度总是很大。深思这样的转折，一定程度上是钢铁行业顽疾所致。先是产业集中度不够。2004年我国前15家钢铁企业的钢产量占钢产量的45％。而韩国浦项钢铁厂的钢产量占该国钢产量的65％：日本前5家钢铁企业的钢产量占该国钢产量的75％；欧盟15国6家钢铁企业钢产量占欧盟整个钢产量的74％：法国的阿赛洛钢铁公司更是几乎囊括了法国的全部钢铁生产。有关认为，我国钢铁产业集中度低，过去是因为计划经济和战备观念有意分散布局，后来又与地方政府和投资方的急功近利有关。使得钢铁生产企业从IO年前大约600家扩张到目前的1000家。产业集中度低，一方面加剧了企业之间的无序竞争，一有风吹草动会引起钢铁价格的大幅波动。有业内人士称。今年4月开始，尽管市场疲软，但钢材产量仍不断扩大，其中有不少地方中小钢铁企业从中“作祟”，为抢在7月《钢铁产业发展政策》颁布的整顿重拳出击前，加快多生产一些钢材，尽可能获取更多的短期收益。以致进一步扰乱了格。另一方面也削弱了钢铁行业在购买原材料、能源等资源时的谈判能力，在资源比较紧张的情况下，加剧了原材料价格上涨的压力。以铁矿石为例。75％的铁矿石生产量和贸易量都集中在世界前三家铁矿石供应商那里，供应商的谈判砝码重；而我国钢铁行业的产业集中度非常低，导致钢铁公司或商在铁矿石时不考虑行业的整体利益，各方之间相互竞价．铁矿石价格波动厉害，对钢铁业整体产生负面影响。低潮中该做什么钢铁产业预警分析说。尽管今年的GDP增幅依然有望保持在7％以上，但从以往钢铁行业的发展规律来看。与钢铁业发展成正比的不是GDP增幅本身，而是其加速度。从去年开始，随着宏观调控的加强，GDP增幅正在下降，钢铁下游产业增长速度放慢，加速度为负，因而钢铁业此次的调整不会是短时间的回落，而是呈显大势的调整。有人形容，过度投资的钢铁行业有如虚火正旺的人，急需正本清源、泻火。而下跌价格作为一剂苦口良药，虽然在短期内使行业有些不能承受，但从长远来看，还是有利于整个钢铁行业发展的。从钢铁行业近年来发展历程看。市场低潮往往是产业结构调整的佳时机。业内分析认为，近年来钢铁巨头的发展战略主要表现在4个方面：“加快化进程”，“并购重组更加突出”，“高度重视资源保证”以及“避开资源劣势，集中力量使技术和质量”。目前，米塔尔集团等排名靠前的大型钢铁企业，已经慢慢丧失区域性企业的色彩，生产基地大步迈向。米塔尔已经在14个开
speaking in a low voice, so full of sweet and hopeful consideration
that I hear it now, ‘the duties of a secretary.’
‘Mind, my dear Agnes?’
‘Because,’ continued Agnes, ‘Doctor Strong has acted on his
intention of retiring, and has come to live in London; and he asked
papa, I know, if he could recommend him one. Don’t you think he
would rather have his favourite old pupil near him, than anybody
else?’
‘Dear Agnes!’ said I. ‘What should I do without you! You are
always my good angel. I told you so. I never think of you in any
other light.’
Agnes answered with her pleasant laugh, that one good Angel
(meaning Dora) was enough; and went on to remind me that the
Doctor had been used to occupy himself in his study, early in the
morning, and in the evening―and that probably my leisure would
suit his requirements very well. I was scarcely more delighted with
the prospect of earning my own bread, than with the hope of
earning it under my old master; in short, acting on the advice of
Agnes, I sat down and wrote a letter to the Doctor, stating my
object, and appointing to call on him next day at ten in the
forenoon. This I addressed to Highgate―for in that place, so
memorable to me, he lived―and went and posted, myself, without
Charles Dickens ElecBook Classics
David Copperfield
losing a minute.
Wherever Agnes was, some agreeable token of her noiseless
presence seemed inseparable from the place. When I came back, I
found my aunt’s birds hanging, just as they had hung so long in
the parlour window of the cottage; and my easy-chair imitating my
aunt’s much easier chair in its position at the open window; and
even the round green fan, which my aunt had brought away with
her, screwed on to the window-sill. I knew who had done all this,
by its seeming to have quietly done itself; and I should have
known in a moment who had arranged my neglected books in the
old order of my school days, even if I had supposed Agnes to be
miles away, instead of seeing her busy with them, and smiling at
the disorder into which they had fallen.
My aunt was quite gracious on the subject of the Thames (it
really did look very well with the sun upon it, though not like the
sea before the cottage), but she could not relent towards the
London smoke, which, she said, ‘peppered everything’. A complete
revolution, in which Peggotty bore a prominent part, was being
effected in every corner of my rooms, in regard of this pepper; and
I was looking on, thinking how little even Peggotty seemed to do
with a good deal of bustle, and how much Agnes did without any
bustle at all, when a knock came at the door.
‘I think,’ said Agnes, turning pale, ‘it’s papa. He promised me
that he would come.’
I opened the door, and admitted, not only Mr. Wickfield, but
Uriah Heep. I had not seen Mr. Wickfield for some time. I was
prepared for a great change in him, after what I had heard from
Agnes, but his appearance shocked me.
It was not that he looked many years older, though still dressed
Charles Dickens ElecBook Classics
David Copperfield
with the old scrupulous cleanliness; or that there was an
unwholesome ruddiness upon his face; or that his eyes were full
and bloodshot; or that there was a nervous trembling in his hand,
the cause of which I knew, and had for some years seen at work. It
was not that he had lost his good looks, or his old bearing of a
gentleman―for that he had not―but the thing that struck me
most, was, that with the evidences of his native superiority still
upon him, he should submit himself to that crawling
impersonation of meanness, Uriah Heep. The reversal of the two
natures, in their relative positions, Uriah’s of power and Mr.
Wickfield’s of dependence, was a sight more painful to me than I
can express. If I had seen an Ape taking command of a Man, I
should hardly have thought it a more degrading spectacle.
He appeared to be only too conscious of it himself. When he
came in, he stood still; and with his head bowed, as if he felt it.
This was only for a moment; for Agnes softly said to him, ‘Papa!
Here is Miss Trotwood―and Trotwood, whom you have not seen
for a long while!’ and then he approached, and constrainedly gave
my aunt his hand, and shook hands more cordially with me. In the
moment’s pause I speak of, I saw Uriah’s countenance form itself
into a most ill-favoured smile. Agnes saw it too, I think, for she
shrank from him.
What my aunt saw, or did not see, I defy the science of
...总装机容量为125万千瓦，相当於目前苏丹各类电站总装机容量的两倍多矿用潜水电泵 单向潜水电泵 qdx3-20-0.55a 周该大坝是迄今非洲大的水坝工程，其土建部分总造价为5.55亿欧元矿用潜水电泵 单向潜水电泵 qdx3-20-0.55a 周水利水电工程总公司与水利电力对外公司组成的投标联营体成为该项目土建工程的中标实体。这是截止目前企业对外承包工程中单项合同金额高的一个项目。麦洛维大坝工程规模庞大、技术复杂、投资巨大，从各个方面来说都是具挑战性的工程。为此，施工单位十分注重工程机械装备的技术与质量。水电七局为三一的老客户。该局负责人表示，经过多年使用三一泵送设备，对三一产品有足够信心。此次承担的工程项目施工难度和要求都很高，我们看正的是三级配混凝土输送泵优于设备的特点。据悉，三级配混凝土输送泵是三一重工专为三级配混凝土泵送而设计的新一代泵送产品，具有设备入场安装方便、安装周期短、布料半径大、浇筑速度快等特点。该产品的研制成功，填补了。三级配混凝土输送是“十五”重大技术装备研制项目，于2003年正式投放市场，目前正在三峡水电站、西电东送等建设工程中发挥着重大的作用。
从钢价回落中审视钢铁业发展之路
随着市场需求的旺盛，钢铁业从冷门走向热门。但在经历了三四年疯狂增长之后。钢铁行业所存在的行业集中度低、生产布局不合理、产品结构矛盾等问题不没有得到解决，一定程度上还日趋严重。如同谁也没有想到今年4月钢铁产品的价格会有如此大幅地下降，业内人士大多跌破眼镜。在上海市场，热卷板价格从3月份高的每吨5500元下降至目前的3700元，冷轧板价格从每吨7000元下降到5000元，螺纹钢价格从每吨3600元跌至2800元。格的回落给了钢铁企业“自省吾身”的压力。同时于本月出台的《钢铁产业发展政策》更意味着产业调整和重组阵痛的逼近。钢材价格怎么了?钢铁行业怎么走?价格风向标下游行业需求减缓．是钢价下降的直接原因。从统计的数字来看，钢材主要下游行业，即建筑、机械、汽车、家电和造船业，在今年3月、4月或者是更早，其增速巳明显减缓。表现明显的是汽车、机械和家电行业，汽车行业从今年1月开始与去年同比几乎没有增长，甚至出现负增长；机械产品的增长率也从去年高时的50％下降到目前的10％左右；家电行业的增长已从高40％的增长速度回落到如今的20％左右。下游已在“刹车”，但由于前两年的疯狂投资，钢铁产业本身的产能依然在不断扩大。数据显示，从2003年到2004年，钢铁行业投资力度大，投资总额在3000亿元以上。其中2003年钢铁业投资同比增长了200％左右。我国钢材产量从1996年突破1亿吨后到2003年突破2亿吨，只用了7年时间。而今年预计将突破3亿吨，新的1亿吨增量耗时两年。据悉，今年前五个月，钢材产量已1．43亿吨，同比增长了25．45％。随着前两年投资在2005年5月之后陆续达产，预计今年钢材产量将3．5亿吨一3．6亿吨。如此一来，供大于求的局面必然产生，格从今年4月份开始大幅度下跌也势在必然。V型转折背后与世界钢铁业的波动相比，钢铁格的起伏总是呈现V字型．而不是相对平缓的波浪型。换句话说，是每转折，不管是从降至升还是从升转降，变化幅度总是很大。深思这样的转折，一定程度上是钢铁行业顽疾所致。先是产业集中度不够。2004年我国前15家钢铁企业的钢产量占钢产量的45％。而韩国浦项钢铁厂的钢产量占该国钢产量的65％：日本前5家钢铁企业的钢产量占该国钢产量的75％；欧盟15国6家钢铁企业钢产量占欧盟整个钢产量的74％：法国的阿赛洛钢铁公司更是几乎囊括了法国的全部钢铁生产。有关认为，我国钢铁产业集中度低，过去是因为计划经济和战备观念有意分散布局，后来又与地方政府和投资方的急功近利有关。使得钢铁生产企业从IO年前大约600家扩张到目前的1000家。产业集中度低，一方面加剧了企业之间的无序竞争，一有风吹草动会引起钢铁价格的大幅波动。有业内人士称。今年4月开始，尽管市场疲软，但钢材产量仍不断扩大，其中有不少地方中小钢铁企业从中“作祟”，为抢在7月《钢铁产业发展政策》颁布的整顿重拳出击前，加快多生产一些钢材，尽可能获取更多的短期收益。以致进一步扰乱了格。另一方面也削弱了钢铁行业在购买原材料、能源等资源时的谈判能力，在资源比较紧张的情况下，加剧了原材料价格上涨的压力。以铁矿石为例。75％的铁矿石生产量和贸易量都集中在世界前三家铁矿石供应商那里，供应商的谈判砝码重；而我国钢铁行业的产业集中度非常低，导致钢铁公司或商在铁矿石时不考虑行业的整体利益，各方之间相互竞价．铁矿石价格波动厉害，对钢铁业整体产生负面影响。低潮中该做什么钢铁产业预警分析说。尽管今年的GDP增幅依然有望保持在7％以上，但从以往钢铁行业的发展规律来看。与钢铁业发展成正比的不是GDP增幅本身，而是其加速度。从去年开始，随着宏观调控的加强，GDP增幅正在下降，钢铁下游产业增长速度放慢，加速度为负，因而钢铁业此次的调整不会是短时间的回落，而是呈显大势的调整。有人形容，过度投资的钢铁行业有如虚火正旺的人，急需正本清源、泻火。而下跌价格作为一剂苦口良药，虽然在短期内使行业有些不能承受，但从长远来看，还是有利于整个钢铁行业发展的。从钢铁行业近年来发展历程看。市场低潮往往是产业结构调整的佳时机。业内分析认为，近年来钢铁巨头的发展战略主要表现在4个方面：“加快化进程”，“并购重组更加突出”，“高度重视资源保证”以及“避开资源劣势，集中力量使技术和质量”。目前，米塔尔集团等排名靠前的大型钢铁企业，已经慢慢丧失区域性企业的色彩，生产基地大步迈向。米塔尔已经在14个开
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