lewis key

美英加陆军规格_馆档网 ... "水平面"," level surface" "切线键;吊楔键"," Lewis key" "电灯"," light" ...

美英加陆军规格_馆档网 ... "水平面"," level surface" "切线键;吊楔键"," Lewis key" "电灯"," light" ...

斜角键 11.路易氏键（Lewis key） 路易氏键如图4-12所示，又称为鲁氏键或 切线键。此键是用两个斜键相对组合而成 。