为自己加油

The minimum jack closed height must be less than the distance between the fitting and the ground when the aircraft is on its wheels.

A.当飞机离地时，最小的千斤项的高度必须小于接头和地面之间的距离。
B.给飞机安装轮子时，千斤頂的最低闭合高度不能超过顶块和地面之间的距离。
C.在顶起飞机之前，最小的顶升高度必须小于顶块和地面之间的距离。