前齿轮有44个齿。
上端前齿过薄，牙釉质几乎消失，牙齿也有损伤。
Upper front teeth that are paper thin, with the enamel almost completely worn away, and teeth that hurt.
齿坎式护岸结构是一种新型挡墙结构，但目前齿坎式挡墙缺乏理论设计规范。
The riverbank protection structure with notched sill is a new type of retaining wall structure, but there is not yet theoretical design standard.
应用推荐