The inner surface of the hoop has rubber grips or steel cleats.环的内侧有橡皮抓子或钢楔子.The government's first task is to get to grips with the economy.政府的首要任务是处理好经济问题。Let us close in on nature and come to grips with her.让我们接近...
介绍了一种用于铸造车间的型砂水分自动控制系统.A sand moisture automatic control system for foundry is introduced.介绍了一种新型的型砂水分测控系统.A new measure & contml system for moisture content sand was introduced.介绍了用累托石粘土作型砂粘结剂和水基涂料悬浮剂的试验结果.Describes som...