【摘 要】
:
在水工建筑物中用启闭机对多扇平面闸门进行启闭操作时,以往多采用一机一门或一机多门(移动式)两种形式。采用一机一门时,造成设备的积压和浪费,同时耗用在拉杆上的钢材数量
论文部分内容阅读
在水工建筑物中用启闭机对多扇平面闸门进行启闭操作时,以往多采用一机一门或一机多门(移动式)两种形式。采用一机一门时,造成设备的积压和浪费,同时耗用在拉杆上的钢材数量相当惊人;采用一机多门(移动式)时,则每次作业,工作人员需反复数次进行联接和卸拉杆穿抽销轴,操作相当频繁,劳动强度大,既苯重又危险,极易发生伤亡事故。为了改变闸门操作的落后状况,近年来有关单位做了不少工作,试制出了几种不同类型
Hoist in the hydraulic construction of the multi-plane gate with hoist operation, in the past to use more than one machine or a machine more than two doors (mobile) in two forms. The use of one machine, resulting in backlog of equipment and waste, while the amount of steel consumed in the drawbars is quite amazing; the use of a multi-door (mobile), then each operation, the staff need to be repeated several times to connect And unloading rod wear pin sales axis, the operation is quite frequent, labor-intensive, both benzene and dangerous, prone to casualties. In order to change the backwardness of the gate operation, a lot of work has been done by the relevant units in recent years to try out several different types
其他文献
汽车作为一种现代化的高速运输工具,随着国民经济的迅速发展,越来越显得重要。因而在现代条件下,作为一名合格的驾驶员不仅要会驾驶车辆,而且还要掌握一定的常见故障的应急
在我的摩友中,有一部分摩友雨天从来不出车。问其原因,回答不外乎两种:一是车辆保养不便,容易伤车;二是雨天行车驾驶难度大。乍一听,或许有人会笑话这些朋友,但仔细一想,这
The highly water-soluble phosphine ligands Na2O3PCH2CH2NH(CH2CH2O)nCH2CH2N- (CH2PPh2)2 (n=1,2,3) were prepared by a new and simple route under mild conditions i
请下载后查看,本文暂不支持在线获取查看简介。
Please download to view, this article does not support online access to view profile.
为提高摩托车驾驶的经济性和安全性,骑手除应做好出车前、收车后的正常维护保养外,在行驶中,必须及时掌握所用坐骑的技术状况,防止带故障行驶,确保正常行车和机件安全。具体
随着汽车工业的发展,具有独特优点的硅整流发电机已逐渐地取代了传统的直流发电机,然而鉴于这种发电机的结构特点,当发现硅整流发电机充电系有故障时,切不可象传统的直流发
Three rare-earth-containing heteropolyoxometalates with different sizes, Na9[Eu(W5 O18)2], K13[Eu(SiW11O39)2], and K17[Eu(P2W17O61)2], have been incorporated by
A Y 3+ complex with triethylenetetraaminehexaacetic acid was prepared and its composition and structure were determined as K 4[Y 2(Httha) 2]·14H 2O by
摩托车都有两套独立的制动装置,即前制动与后制动,也就是人们常说的手刹与脚刹。正确使用制动装置,可以达到节省燃料,减少轮胎及各部件磨损和安全行车的目的。 一、前制动的
The structures of five metabolites (2-6) of agarofuran 1 were confirmed by synthesis. The configuration of the secondary hydroxyl in 7 was determined by Horeau