译：GB/T 7307-2001 Pipe threads with 55 degree thread angle where pressure-tight joints are not made on the threads

译：GB/T 4142-2001 Cylindrically coiled tension spring dimensions and parameters(Ring profile with hook)

译：GB/T 5983-2001 Test methods for seed cleaning machine

译：GB/T 6075.3-2001 Mechanical vibration—Evaluation of machine vibration by measurements on non-rotating parts—Part 3:Industrial machines with nominal power above 15kW and nominal speeds between 120r/min and 15000r/min when measured in situ

译：GB/T 7940.2-2001 Pneumatic fluid power—Five-port directional control valves—Part 2:Mounting interface surfaces with optional electrical connector

译：GB/T 4329-2001 Tractor and machinery for agriculture and forestry—Linch pins and spring pins—Dimensions and requirements

译：GB/T 7940.1-2001 Pneumatic fluid power—Five-port directional control valves—Part 1:Mounting interface surfaces without electrical connector

译：GB/T 6075.4-2001 Mechanical vibration—Evaluation of machine vibration by measurements on non-rotating parts—Part 4:Gas turbine driven sets excluding aircraft derivatives

译：GB/T 7940.3-2001 Pneumatic fluid power—Five-port directional control valves—Part 3:Code system for communication of valve functions

译：GB/T 2543.2-2001 Textiles—Determination of twist in yarn—Part 2:Untwist-retwist method