柱面螺旋线

equal-angle transversal elliptic cylindrical projection【测】

segmental abrasive disc grinding with the cylindrical surface

semi-automatic high-speed angular plunge cylindrical grinder

high-fine semi-auto universal cylindrical grinder

propulsion with ground-engaging cylindrical screw drives

cylindrical breast, tubular breast

underfeed grate, cylindrical roller grate

cylindrical gate