spanner for square screw 方螺钉扳手

brass square screw hook 黄铜螺丝曲尺钩

square thread screw pump 矩形螺杆泵 ; 长方形螺杆泵

screw pump with square thread 方形螺杆泵

square-head screw 方头螺钉

spanner r for square screw 方螺钉扳手

iron square head screw 方头铁螺钉

square neck screw 方颈螺丝

square-socket set-screw 内方头紧定螺钉