2) fuel delivery valve 输油活门3) intertank transfer valve 油箱间转输活门4) supply valve 供给活门5) oil valves 输油阀门 1. Some wrong ways to maintain oil valves are analyzed. 列举了输油阀门在维修保养时的几种错误作法,如用砂纸、钢刷清除阀杆梯形螺纹锈迹;更新填料时旧填料末清除干净,...