英语词典
Electric heater or ultrasonic knurling device can be installed.
可选装电热或超声波滚花装置.
互联网摘选
Knurling is the process of producing a roughened surface by means of a specialized forming tool called a knurl.
是一种专门成形刀具叫滚花轮,将表面制成粗糙表面。
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