oil motor-driven pump
21Recreational vehicle — This article is about the vehicle. For the film, see RV (film). RV redirects here. For other uses, see RV (disambiguation). A Class A motorhome with slide out extended floors …
22Motorized bicycle — A VéloSoleX motorized bicycle A motorized bicycle, motorbike, cyclemotor, or vélomoteur is a bicycle with an attached motor and transmission used either to power the vehicle unassisted, or to assist with pedaling. Since it always retains both… …
23commercial fishing — Introduction the taking of fish and other seafood and resources from oceans, rivers, and lakes for the purpose of marketing them. Fishing is one of the oldest employments of humankind. Ancient heaps of discarded mollusk shells (shell… …
24Mazda RX-7 — Manufacturer Mazda Production 1978–2002 811,634 produced[1] Assem …
25Swing door operator — A swing door operator (or swing door opener or automatic swing door operator) is a device that operates a swing door for pedestrian use. It opens or helps open the door automatically, waits, then closes it. Types There are 3 basic types of swing… …
26Saab H engine — The Saab H engine is a redesign of the Saab B engine. Despite the name it is not an H engine, but a slanted inline 4. The H engine was introduced in 1981 in the Saab 900 and was also used in the Saab 99 from 1982 onwards and the Saab 90. It… …
27petroleum refining — Introduction conversion of crude oil into useful products. History Distillation of kerosene and naphtha The refining of crude petroleum owes its origin to the successful drilling of the first oil well in Titusville, Pa., in 1859. Prior to… …
28Luna (tugboat) — Infobox nrhp | name =LUNA (tugboat) nrhp type = nhl caption = location= NDC pier, Boston, Massachusetts lat degrees = 42 lat minutes = 22 lat seconds = 4 lat direction = N long degrees = 71 long minutes = 4 long seconds = 27 long direction = W… …
29Pumped-storage hydroelectricity — Hydro storage redirects here. For storage of water for other purposes, see Reservoir. Diagram of the TVA pumped storage facility at Raccoon Mountain Pumped Storage Plant …
30Sewage treatment — The objective of sewage treatment is to produce a disposable effluent without causing harm to the surrounding environment, and also prevent pollution.[1] Sewage treatment, or domestic wastewater treatment, is the process of removing contaminants… …
