A mini-sized sand-blasting gun of ejection-and absorption type,used to clean and roughen the metallic surfaces for therm一种小型的射吸式喷砂枪，可用作喷涂喷焊前的表面清洁毛化处理。
A miniature, hand-held sand-blasting device used to remove unwanted images from lithographic plates. Air erasers are als中义一种小型手握的喷砂装置，可去掉平版上不要的印纹部份而不会伤到印版。