Je3A3275当采用气举反循环排渣时,风管的下设深度一般不超过()m。 ["30;","40;","50;","60。"]
“存在就是被感知”这种观点属于() ["朴素唯物主义","形而上学唯物主义","主观唯心主义","客观唯心主义"]
两端均安装双向推力轴承的滚珠丝杠支承方式适用于()的场合。 ["支承能力小","丝杠长度短","丝杠较长","刚度要求高","位移精度要求高","传动效率要求高"]
心理剧
与车轮平衡无关的因素是() ["轮胎的几何变形","轮辋变形","轮胎磨损不均","轮胎气压"]
一般塑料型材挤出成型模具应包括两部分:()和()。