The invention provides a tri-body skimming boat, composed of a main boat body and two supplementaryplate bodies in the same size.
本发明提供的是一种三体滑行艇，由主船体及两个大小相同的辅助片体组成。
2
Advanced warning of restricted headroom may be given by a restricted headroom ahead warning sign with a supplementaryplate showing the distance to the restriction.
前面有通行高度限制的警告标志，用以预先警告驾驶人，并有辅助标志牌，说明限制生效的地点距离有多远。
3
By analyzing the labor, material, machine and the price composition for steel plate pasting, the paper makes a study on how to calculate the cost of steel plate pasting with supplementary quota.