国产在线一二三精品观看,亚洲中文精品人人永久免费,亚洲综合av一区二区三区蜜桃,精品少妇一区二区久久久,在线观看亚洲av每日更新不卡,亚洲一区二区三区精品电影网站,久久精品国产亚洲av五区,久久夜色国产精品一区二区

　　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 .