... straight button hole machine 直线钮孔机 straight carbon steel 普碳钢 straight crank 直线曲柄 ...
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J41N Type PN40 steel globe valves: manual, flanged, straight-through, the valve seat sealing surface material as nylon plastic, nominal pressure PN40, carbon steel valve body material cut-off valve.
J 41 n型PN 40钢制截止阀：手动、法兰连接、直通式、阀座密封面材料为尼龙塑料、公称压力pn 40、阀体材料为碳素钢的截止阀。
Carbon Steel, Alloy Steel and Stainless Steel of Seamless, Straight or Spiral Welded Pipes.
碳钢、合金钢、不锈钢无缝、直缝或螺旋焊缝钢管。
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