The text introduces the welding leak phenomena of large caliber pipe across river, and wet or dry welding repair technology below water.
介绍了大口径过河钢管接口焊缝爆漏现象，以及湿法和干法水下焊接修复技术。
This large caliber pipe has well airproof and mechanical capability so that it can be used in gas transmission.
针对这种管道直径大、密封可靠、力学性能良好等特点，可以用于煤矿通风管道。
In the light of technology, the writer analyses the economic benefits and accounting of large caliber and long distance water delivery pipe.
针对确定的工艺进行了大口径长距离输水管道经济效益分析与核算。
The Paper introduces the application of PLC in Medium-frequency heating bender for large caliber pipe, and design scheme of the main control sub-routine is given.
本文介绍了PLC在大口径中频加热弯管机控制系统中的应用，并给出了控制系统关键子程序的设计方案。
This paper introduces the construction technology of underwater installation of large-caliber GRP pipe in the Yangtze Estuary Area.
本文简述了长江口水域实施大口径玻璃钢管水下安装施工工艺。
This paper introduces the construction technology of underwater installation of large-caliber GRP pipe in the Yangtze Estuary Area.
本文简述了长江口水域实施大口径玻璃钢管水下安装施工工艺。
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