Yuav ua li cas koj xaiv ntawm ib tug Extension thiab ib tug Compression Spring?
Yuav ua li cas koj xaiv ntawm ib tug Extension thiab ib tug Compression Spring? Koj tus tsim xav tau lub caij nplooj ntoos hlav, tab sis qhov twg? Kev xaiv tsis raug ua rau muaj kev tsim loj heev,