clearances间隙clearancen.清除；清理；清仓甩卖；间隙；许可证；结关；通关clearance under keel富裕水深clearance of brazing钎焊间隙clearance atmosphere通关环境clearance for bridge桥梁建筑限界clearance inspection间隙检查clearance adjustment孔隙调整clearance of amylase淀粉酶清除率clearance of solutes溶质清除率clearance taper print[机] 外伸斜度砂心头clearance measurement间隙测量