Absolutely avoid pipe end in contact with water, never rust.

绝对避免管子端面与水接触, 永远不会生锈.

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Chinese natural gas prices, including appearances Price, Price and pipe end - user price.

中国天然气价格包括出场价格 、 管输价格及终端用户价格.

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The main defects are deformation and burrs of cutting surface in the square pipe end.

切口变形和毛刺是矩形管管端的主要缺陷.

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The basic principle and the method of oil drill pipe end upsetting process were presented.

介绍了石油钻杆端部镦锻加厚工艺基本原理及加厚方式.

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This article introduced calculating method of tensile force size reducing welded pipe end cutting length.

介绍了本公司张力减径焊管切头尾长度的计算方法.

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The design of non - dig drill pipe end - upsetting product line autocontrol system were introduced in this paper.

介绍了 非 开挖钻杆管端加厚生产线自动控制系统的设计.

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