中凸车削附件
convex turning attachment
球面凸面镜
Spherical Concave and Convex Mirrors
凸面铣削附件
convex milling attachment
非球面车削
turning of asph eric surface
椭球面车削
turning the surface of an ellipsoid
高压洗车附件
high pressure washdown attachment
自行车附件产品
bike accessories products