F - Mech Eng,Light,Heat,Weapons – 16 – G
Inventor
F - Mech Eng,Light,Heat,Weapons
16
G
Inventor
Country: China
A 3-pillar pumping unit driven by compound permanent-magnet...
A belt shock absorber for tower belt-driven pumping unit
A clamp device for belt connection
A clearance method and device for the oil pumping unit...
A counterweight structure for vertical oil pumping unit
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