Remove pipe plug covering the valve enclosure.

拆卸盖在阀门外壳上的管道塞。

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The article deals with the computer software system for the plug pipe mill, covering such aspects as functions, structure and configuration of hardware and software.

介绍了自动轧管机组计算机软件系统的功能与结构、硬件与软件的配置。

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The investigations show that the secondary maintenance for steel pipe piles by the methods of underwater coating and drainage covering ia an effective measures.

研究表明，采用水下涂料和排水护套法对钢管桩进行二次维护是行之可效的。

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Environment Agency Wales says the fish passed through the mesh covering an inlet pipe while the lake was being emptied for a safety inspection.

BBC: Dead fish

But investigators found that due to their small size, the perch and roach passed through the mesh covering an inlet pipe while the lake was being emptied, and died as a result.

BBC: Dead fish