hydraulic wedge
31Shaft construction — concerns the building of vertical openings such as Raises and Shafts. Shafts are vertical openings used for supplying equipment, personnel, and support systems to the horizontal tunnel where the pipeline is installed. They can be temporary or… …
32Rail fastening system — Elements of a baseplate based rail fastening system 1. Screw for fixing plate to sleeper 2. Elastomeric pad supporting rail 3. Tension washer 4. Rail clamp 5. Tensioning bolt (nut not shown) 6. Baseplate …
33Machine — This article is about devices that perform tasks. For other uses, see Machine (disambiguation). A machine manages power to accomplish a task, examples include, a mechanical system, a computing system, an electronic system, and a molecular machine …
34Wire rope — consists of several strands laid (or twisted ) together like a helix. Each strand is likewise made of metal wires laid together like a helix. Initially wrought iron wires were used, but today steel is the main material used for wire ropes.History …
35sedimentary rock — Rock formed at or near the Earth s surface by the accumulation and lithification of fragments of preexisting rocks or by precipitation from solution at normal surface temperatures. Sedimentary rocks can be formed only where sediments are… …
36Erosion — is the carrying away or displacement of solids (sediment, soil, rock and other particles) usually by the agents of currents such as, wind, water, or ice by downward or down slope movement in response to gravity or by living organisms (in the case …
37Chrysler LA engine — The LA engines are a family of pushrod OHV 90° V block gasoline engines built by Chrysler Corporation and factory installed in passenger vehicles, trucks and vans, commercial vehicles, marine and industrial applications from 1964 through 2003.… …
38Chevrolet Straight-6 engine — Straight 6 Manufacturer General Motors Corporation Production 1929 1990 North America 2002 2009 (Atlas LL8) North America 1962 1999 Brazil Predecessor 171 Straight 4 Successor GM Atlas engine Valvetrain …
39Saltwater intrusion — is a process that occurs in virtually all coastal aquifers, where they are in hydraulic continuity with seawater. It consists in salt water (from the sea)flowing inland in freshwater aquifers. This behaviour is caused by the fact that sea water… …
40Pneumatic motor — The Victor Tatin airplane of 1879 used a compressed air engine for propulsion. Original craft, at Musée de l Air et de l Espace …
