The screw jack adopts ລະບົບສາຍສົ່ງກົນຈັກ, ສ່ວນໃຫຍ່ແມ່ນປະກອບດ້ວຍ screw rod, handle, base, screw sleeve, rotating rod, retaining ring and supporting cup parts.Screw jack is pure machinery, use of screw lift to transfer power, like wrench screw bolts. , ແກ່ນ, ແກ່ນ, bolt ຈະ stretch ອອກ, r ...
ອ່ານຕື່ມ