double lead screwdouble pitch screwdouble-cut screwdouble-flight screwtwo-flight screw双: two; twin; both; dual螺纹: screw thread; flight; helica ...螺杆: screw; spiral; screw arbor; ...全双螺纹螺杆: full double-flighted type screw双螺纹螺杆头部: double tip下载手机词典可随时随地查词查翻译
