...液力传动术语 Hydrodynherehasic drive terminology 气动调节阀 Pneumatic industrial process control valves 流体运输用热塑性塑料管材 公称外径和公称压力 Thermoplastics pipes for the conveyance of fluids--Nominal outside diherehas...
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...壁直通管接头 Flared type tube fittings--Bulkhead union--Bssembly 气动调治阀 Pneumatic industrial process control valves 中心距至端面的距离 center to end ..
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