Wave action applied pressure to the bottoms and sides, and the pressure propagated up through the ice to the surface.
海浪的作用力向其底部及侧部挤压，这股压力向上传递至冰山的表面。
2
The valve covers are transitionally fit and connected with the valve bottoms or clamped with the valve bottoms via clamps, ensuring the normal and safe utilization of the pressure cooker.