The two diagonals of a square cross in the centre.

正方形两条对交于正方形的中心。

Footsteps had scored a diagonal path through the snow.

脚印在雪地上留下了一条对。

As the crane is static the mast sections are directly fishplate onto the 4 fixing angles corresponding to the mast type used.

于该起重机是固定式的，其塔节与四固定钢呈鱼尾形（译注：即对），而钢的形式又与塔身类型相对应。