欧美日韩夫妻精品|亚洲最新无码视频|亚洲偷偷自拍无码|久草AV成人色欧美综合|91麻豆大神日韩欧美亚|亚洲制服无码国产|日本无码高清视频一区二区|日本亚洲久久九九电影黄色|色欲av一区二区三区男人的天堂|久久做品人人做人人综合

Handan Zhengteng fastener Manufacturing Co., LTD

Handan Zhengteng Fastener Manufacturing Co., LTD., located in China's largest fastener production base, Hebei Yongnian, the company has advanced high-speed cold pier equipment, first-class technical personnel and strict quality assurance system, professional production: 4.8 grade, 8.8 grade, 10.9 grade flange bolts, product standards are GB 5787, GB 5789, DIN 6921, JIS B 1189, etc. Zhengteng fasteners regard product quality as the life of the enterprise, heavy contract, credit, willing to sincerely cooperate with friends from all walks of life at home and abroad, go hand in hand, create a better tomorrow!