n.凸缘；边缘；轮缘；【机械】法兰（使管子与管子及和阀门相互连接的零件，连接于管端）
v.装凸缘
Every lens has a mounting flange with which it is attached to the camera body. 每个透镜都有一个安装凸缘，依靠它才能把透镜安装到相机上。
The bottom flange and the diaphragms must be selected carefully to match the product. 为与产品匹配，需仔细选择底部边缘和隔膜。
