91n免费处女在线-好吊色视频在线观看-亚洲中文字幕人成乱在线-国产成人香蕉久久久久-国产成人在线精品-日韩三十路人妻一区-无码国内精品人妻少妇蜜桃视频-69xx视频在线观看-女同一区二区免费aⅴ

　　The company strictly implement the ISO9001-2000 quality management system, strengthen quality control, through the establishment of quality control points, all staff participation, to focus on the key process management control. Technical and QC departments strictly enforce the process initial inspection, routing inspection and final inspection, resolutely prevent unqualified products go outside of factory. Fruitful achievement wrote our success and pride, our products have obtained numerous awards: Obtain Integrity unit of provinces and cities for three consecutive years, Tenglong enterprises of Liaoning Province, high chrome casting was rated as Chaoyang City famous products, our high manganese steel casting obtained "Liaoning Province Famous Products", and others .