底封是一种涂在汽车底部的防水材料。
The underseal is a kind of waterproof material to coat the bottom of the car.
艏，艉尖舱底部为单底结构。
缸体的顶部是气缸盖，它组成了燃烧室，缸体底部是油底壳。
The bottom of the block is covered with an oil pan or oil sump.
缸体的顶部是气缸盖，它组成了燃烧室，缸体底部是油底壳。
The bottom of the block is covered with an oil pan or oil sump.
应用推荐