outer-spiral-rib copper tube 外螺纹铜管
spiral rib steel wire 螺旋肋钢丝
To expound the production of spiral rib steel wire in such aspects as raw material selection, processing requirements of die, and requirements in product standard.
从原料选择、生产模具的加工要求、产品的标准要求等方面对螺旋肋钢丝生产作了论述。
Screw: In machine construction, a usually circular cylindrical member with a continuous spiral rib or thread, used either as a fastener or as a force and motion modifier.
螺纹件： 机器结构中带连续螺旋肋的圆柱形件，用作紧固件或力和运动变换装置。
The invention provides a drain pipe comprising a main pipe, wherein installing parts are arranged at both ends of the main pipe and a spiral rib is arranged on the pipe wall of the main pipe.
本发明提供一种排水管。所述排水管包括一个主管，所述主管两端设有安装部，所述主管的管壁上设有螺旋筋。
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