underside handholds

例句：

1. 1.The car has a large underside door for easy access to the cargo area.
   这辆车有一个大型的下侧门，便于轻松进入货物区。
2. 2. The underside of the table is smooth and easy to clean.
   桌子的下侧是光滑的，易于清洁。
3. 3. The underside of the ship was covered in rust after years of use.
   经过多年的使用，船的下侧被锈迹覆盖。