A sand belt device can be mounted detachably on a body portion of a portable grinding machine so as to replace a grinding wheel of the portable grinding machine. The sand belt device includes a positioning member which has a front part and a rear part that is fitted tightly and detachably...
发明人: JP Jeon 摘要: The present invention relates to a needle, which is designed to improve the various problems caused when a conventional needle is threaded, and to be used by forming a ring line in the glans of the needle to easily use the needle.收藏...