clearances间隙clearancen.清除；清理；清仓甩卖；间隙；许可证；结关；通关clearance of carbon particles碳粒廓清clearance take-up mechanism滚筒调距装置clearance of roadside traffic清理沿线各站货运办法clearance interfering section侵限段clearance stomach hot methods清胃热clearance of stability margin稳定裕度评估clearance and inhibition cost清理和制止费用clearance gage for pantographs集电弓隔离限界clearance simulation technique间隙模拟技术clearance of the lower branches打枝