为什么直行程调节阀阀杆较细?
如果按行程特点,调节阀可分为直行程和角行程;
If press trip characteristics, the regulator can be divided into straight travel and quarter-turn;
如果按行程特点,调节阀可分为直行程和角行程;
If press trip characteristics, the regulator can be divided into straight travel and quarter-turn;
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