Aug 06, 2020 Ħalli messaġġ

X'inhuma ż-żewġ tipi ewlenin ta 'drill bits?

rolling cutterbitsand cutterbits fissi. Barra minn hekk, id-daqsijiet tal-bits ivarjaw minn 3-7 / 8 pulzier sa 36 pulzier.

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