厂矿企业专用线属于（）。（A、2、Y）[05-00-03-01][010102] ["岔线","三角线","换装线","特别用途线"]
英译中：Export
英译中：Electronic clearance
因特殊情况需在到发线警冲标外方进行装卸装卸作业时，须经（）准许。（B、2、Y）[05-00-03-01][020102] ["调车长","货运主任","装卸队长","车站值班员"]
调车作业时超过2.5‰的坡度是指该线有效长内的（）坡度。（B、5、X）[05-00-02-02][020101] ["最大","实际","平均","换算"]
英译中：Duty
