【化】 暗杆内螺纹

inside screw screw stem pinch and screw scrape and screw pushing and pulling screw jack inside stem screw stem for stem stem to stem inside broach inside cornice inside screw and rising stem (ISRS) non-rising stem valve non-rising-stem valve inside screw rising stem screw adjusting inside caliper regulating stem set screw inside and outside caliper inside and outside callipers inside and outside grinding