Xov xwm kev lag luam

Taw qhia rau kev siv cov studs.

bm = 1d ob chav stud feem ntau yog siv rau kev sib txuas ntawm ob qhov txuas steel; bm = 1.25d thiab bm = 1.5d ob chav stud feem ntau yog siv rau kev sib txuas ntawm cov cam khwb cia hlau txuas ...

Nyeem ntxiv

Cov yam ntxwv tsis zoo thiab kev ua haujlwm ntawm bolts.

Raws li lub zog hom kev sib txuas, nws tau muab faib ua qhov zoo tib yam thiab hinged qhov. Raws li cov duab ntawm lub taub hau: hexagonal taub hau, puag ncig lub taub hau, square taub hau, countersunk taub hau thiab hais txog.

Nyeem ntxiv

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Mr. Ma
Mr. Ma

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