8X8Ⅹ永久免费视频,欧美性群另类交,亚洲中文爆乳AV,哔哩哔哩视频在线观看

3091-2015 implementation of standard certificate (Handan)

3091-2015 implementation of standard certificate (Qian'an)

SGS

Product hygiene license approval No. 1

Product hygiene license approval No. 2

Welded pipe for low pressure fluid delivery - Certificate of

Certificate of qualification

Steel pipe for petroleum and natural gas pipeline system - C

Spiral pipe API certificate

Product standard

Special equipment permit

No.9, Juliang Ave, Cheng'an Industrial Zone, Handan, Hebei

Qian'an Zhengda: North of Shuangma Road, Zhaodianzi Town, Qian'an, Tangshan, Hebei Province

Shanxi Zhengda: Houbei Industrial Park, Houma City, Shanxi Province

hotline

TEL：+86-310-5231366/758/756/996
ADD：No. 9 Juliang Avenue, Chengan Industrial Zone, Handan City, Hebei Province

Wechat Service Number