We manufacture Drum Shaft вал барабана for oilfield drawworks include Lanzhou LS,Bomco,RG petro,SJ petro,Honghua etc.
Jining Donghong Machinery Co., Ltd
www.dhparts.com
spareparts1960@foxmail.com
dh@dhparts.com
Mobile/WhatsApp: 0086-18954079939
Skype: spareparts1960
API OSHA IADC OPEC RIG ZONE WORLD OIL Drilling Formulas
