Hardware: five metals. In ancient times, it refers to five metals such as gold, silver, copper, iron and tin, which were artificially processed into metal objects such as knives, swords and works of art. "Wu Yue spr···

Vertical machining center classification and differenceclassificationClassification by guide railAccording to the form of vertical machining center axis guide rail can be divided into hard rail and line rail. Hard rail i···