久久伊人色av天堂九九小黄鸭,97久久久亚洲综合久久88,国产精品麻豆91天堂,久久久久久国产精选av香蕉,精品久久久久久久国产,久久久久久久激情五月天,精品久久久久久97人妻九o,丰满少妇一区二区三区在线播放,91九色国产视频蝌蚪

展開

Quality Certificate

certificate

The company has passed special equipment (TSG), quality (ISO9001), environment (ISO14001), occupational health and safety (ISO45001), integration of industrialization and industrialization (GB/T23001), intellectual property rights (GB/T 29490), API (United States Petroleum Association), CE (European Union), EAC (Eurasian Economic Union) and other production licenses, management systems and product access certifications, and has established a strict quality control and assurance system.

We follow the quality policy of "pursuing excellent quality, meeting customer requirements, innovating and improving, and exceeding customer expectations", and every batch of materials, every process, every part, every product, and every work are placed under the complete and effective system monitoring and control, so that its quality has been fully guaranteed.