In general, there are two kinds of method to govern velocity of press, one is throttle velocity governing, the other is volume velocity governing.
一般情况下，压型调速方法有两大类，一类是节流调速，另一类是容积调速。
In general, there are two kinds of method to govern velocity of press, one is throttle velocity governing, the other is volume velocity governing.
一般情况下，压型调速方法有两大类，一类是节流调速，另一类是容积调速。
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