In long pipe line, especially multi-undulate pipeline, the difficulty of prevention water hammer is most difficult.
在长间隔输水管线中，尤以多起伏管道水锤防护难度最大，发生水锤事故最多。
However, a long pipe line across the way the Chinese version of the whole thing will encounter a variety of geological disasters, once suffered damage, will cause unpredictable consequences.
但由于管道线路长，横跨中国整个东西版途会遭遇各种地质灾害，一旦遭遇破坏，会造成不可预料的后果。
By insulating flange at the junction between the new and old pipe, the long line galvanic cell is "broken up" - the anode (new pipe) is electrically separated from the cathode (old pipe).
在新、旧管子连接处安装绝缘法兰，破坏了长管道的原电池，即：阳极(新管子)和阴极(旧管子)间电断路。
Here car line the long dragon, the exhaust pipe constantly spew exhaust.
这里汽车排成了长龙，排气管不断地喷吐着尾气。
Discusses the selection line methods of convey coal pipe of long distance, from the angles of selection line principle, and the basic data to collect, etc.
本文从选线的原则、选线需搜集的基础资料等角度，论述了长距离输煤管道线路的选线方法。
Features and effects of in-factory quality supervision during manufacture of long distance transmission line pipe are discussed. It is suggested that understanding standard should be improved.
本文总结了输送管生产驻厂监督工作的特点及作用，指出在对生产标准的理解方面须进一步加强。
HGJ-800 pipe cut-off machine, which is used in a long-pipe hot rolling line, and can short cut-off time and has less pollution and safer working, is described.
介绍一种适于热轧长钢管生产线使用、锯管时间较短、环境污染小和使用安全的HGJ- 800型钢管锯断机。
To solve the traditional long-term and labour-consuming problems existed in communication pipe-line man-hand hole, a new type man-hand hole by processing hard material PVC is proposed.
为了解决传统通讯管道人手孔存在的费时费工等问题，采用硬质聚氯乙稀板材加工制造了一种新型人手孔。
To solve the traditional long-term and labour-consuming problems existed in communication pipe-line man-hand hole, a new type man-hand hole by processing hard material PVC is proposed.
为了解决传统通讯管道人手孔存在的费时费工等问题，采用硬质聚氯乙稀板材加工制造了一种新型人手孔。
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