Suitable drain holes and air holes to be provided on transverse structural members. The scallops in bottom area to be not less than 100mm radius.
在横向构件上应提供适当的排放孔和透气孔，底部区域的扇形孔的半径应不小于100 mm。
2
The loading ability is moderate according to the potential indices evaluative criteria for longitudinal oil drain system and transverse direction oil drain system.