Sheet Metal , Metalworking Guillotine , Shear, Bend Shear , New , Used, Machinery Sheet Metal.采购产品金属板材, 金属加工(剪切, 弯曲)机械钣金.It is introduced the classification, composition and properties of metalworking fluids.介绍了金属加工液的分类,...
Police were periodically patrolling the area.警察定时在这一地区巡逻。Police are patrolling the major approach roads to the stadium.警察正在通往运动场的主要道路上巡逻.I saw women patrolling the streets with rifles on their backs.我看到妇女背着枪在街上巡逻....