请帮我翻译一下!
treading and drilling of collector bar
集电极棒的攻丝及钻孔
这怎么翻译:告诉我你做什么产品?
答:猜不透… 我总是一副毫无表情的面孔 他根本无法读懂我详情>>
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问:head+hand+hardworking=success 什么意思
答:head+hand+hardworking=success 脑+动手+努力工作 = 成功详情>>