Paint the tooth flank of the big bevel gear with a thin and equal red lead coat.

即在大锥齿轮的齿面上涂一层薄而均匀的红铅油，然后转动齿轮数圈。

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Paint the tooth flank of the big bevel gear with a thin and equal red lead coat.

即在大锥齿轮的齿面上涂一层薄而均匀的红铅油，然后转动齿轮数圈。

youdao