采用(yong)刮研工(gong)藝(yi),按(an)照JB/T7974-99標(biao)準制造,具(ju)有(you)精(jing)度高,穩定(ding)性(xing)好(hao)等(deng)優(you)點(dian),適(shi)用(yong)於各(ge)種檢(jian)驗工(gong)作(zuo),精(jing)密(mi)測量(liang)用(yong)的基準平面(mian),在機(ji)械(xie)制造中(zhong)也是(shi)不可缺少的基本工(gong)具(ju)。