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1990年4月18日机电部以机发〔1990〕31号文批准发布了凿岩机械气动工具专业如下九项产品质量分等部标准: 1.JB/SQ3-90《气腿式凿岩机产品质量分等》; 2.JB/SQ4-90《YN30A型手持式内燃凿岩机产品质量分等》; 3.JB/SQ5-90《G10型气镐产品质量分等》; 4.JB/SQ6-90《直柄式气动砂轮机产品质量分等》; 5.JB/SQ7-90《手持式凿岩机产品质量分等》; 6.JB/SQ8-90《气铲产品质量分等》; 7.JB/SQ136-90《CLQ15型履带式露天钻车产品质量分等》; 8.JB/SQ137-90《起动用叶片式气动马达产品质量分等;
April 18, 1990 Department of Electrical and Mechanical Services Department [1990] No. 31 approved the release of pneumatic tools, drilling machinery, the following nine professional product quality standards division: 1.JB / SQ3-90 “air leg rock drill product quality points Etc. ”; 2.JB / SQ4-90“ YN30A hand-held internal combustion rock drill product quality grading ”; 3.JB / SQ5-90“ G10-type product quality grading ”; 4.JB / SQ6-90“ straight Handle pneumatic pneumatic grinder product quality classification ”; 5.JB / SQ7-90“ hand-held rock drill product quality grading ”; 6.JB / SQ8-90“ gas shovel product quality grading ”; 7.JB / SQ136- 90 “CLQ15 tracked open-pit car product quality classification”; 8.JB / SQ137-90 "Starter blade air motor product quality classification;