工(gong)字(zi)型平(ping)尺(chi)(chi)(chi)按/T7977－99制造，材料為HT250，工(gong)作(zuo)面采用刮研或jingmi磨(mo)削工(gong)藝，工(gong)字(zi)型平(ping)尺(chi)(chi)(chi)用于機床檢(jian)(jian)驗(yan)中檢(jian)(jian)驗(yan)不(bu)平(ping)度(du)和(he)不(bu)直(zhi)(zhi)度(du)兩個是配(pei)合塊規(gui)、千分尺(chi)(chi)(chi)、水平(ping)儀等儀器檢(jian)(jian)測不(bu)同高(gao)度(du)兩導軌的平(ping)行和(he)不(bu)連接導軌的水平(ping)，并可以(yi)配(pei)合直(zhi)(zhi)角(jiao)尺(chi)(chi)(chi)，檢(jian)(jian)驗(yan)只(zhi)用直(zhi)(zhi)角(jiao)尺(chi)(chi)(chi)無法檢(jian)(jian)驗(yan)的兩機件(jian)的垂直(zhi)(zhi)度(du)的量具。

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