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[国外标准] BS 84-2007 Parallel screw threads of Whitworth form Requirements
906.63 KB2020-11-28
813.42 KB2020-11-27
1.75 MB2020-11-27
[国外标准] ASTM F885-84 (Reapproved 2006) Standard Specification for Envelope Dimensions for Bronze Globe Valve
62.67 KB2020-11-16
[国外标准] ASTM F841-84(R2006) Standard Specification for Thrusters, Tunnel, Permanently Installed in Marine Ve
97.13 KB2020-11-16