Screw jack imagwiritsa ntchito makina otumizira, makamaka opangidwa ndi screw ndodo, chogwirira, maziko, screw sleeve, ndodo yozungulira, mphete yosungira ndi mbali za chikho. Screw jack ndi makina abwino, kugwiritsa ntchito wononga wononga kusamutsa mphamvu, ngati mabawuti opindika. , mtedza, mtedza, bolt idzatambasula, ...
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