快邮公司的名称 Name of Courier Company
管道元件的公称通径 Nominal size for pipe components
公称直径的测定 Determination of nominal diameter
公会的名称 Guild Name
螺纹的公称中径 Basic pitch diameter of screw
允许的公称尺寸上偏差 Allowance above nominal size
封头的公称直径 DN
圆机的公称直径 Nominal diameters of circular machines
出口公司的名称和地址 Name and address of exporter
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。
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.
指出螺栓联接的扭紧力矩值不仅与螺栓的公称直径及性能等级有关，还与能否保证联接可靠工作有关。
The value of tightening torque is relative not only to the nominal diameter and quality class of the bolt, but also to the security of the threaded fastener.
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