metal screw with half-round head的意思|示意

金属半圆头螺钉 metal screw with flat head 金属平头螺钉 metal screw with half-round head 金属半圆头螺钉 metal sealed paper-insulative capacitor 金属密封纸介电容器 ..

金属圆头螺钉 ... half-round head screw 半圆头螺钉 metal screw with half-round head 金属圆头螺钉 half-round head square neck bolt 半圆头方颈螺栓 ...