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to phrases
arc of contact
auto.
齿轮
接触弧
;
啮合弧
;
带与带轮
接触弧
dril.
皮带包角
;
皮带接触弧
met.
接触弧
oil
包角
arc of contact:
6 phrases
in 2 subjects
General
1
Metallurgy
5
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