Specification for pumping units / American Petroleum Instit-ute.
American Petroleum Institute
Specification for pumping units / American Petroleum Instit-ute. - Washington, D. C. : API - 58 p. - API specification ; II E .
Specification for pumping units / American Petroleum Instit-ute. - Washington, D. C. : API - 58 p. - API specification ; II E .