正确答案: A
A.0.5°~1.0°
题目:一般情况下,要求针阀的锥角较阀座的锥角大()。
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学习资料的答案和解析:
[单选题]The lubricating oil is pumped from the drain tank, very often with () in the suction line.
a magnetic filter
[单选题]The needle valve in a fuel valve will () when the fuel pressure action on the needle valve tapered face exerts a force lower than that of the spring compression.
be seated