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2. Welding blanket - Wikipedia

   en.wikipedia.org/wiki/Welding_Blanket

   A welding blanket is a piece of safety equipment designed to protect equipment and the welder while welding. [1] A welding blanket typically consists of a layer of flexible protective material containing unexpanded vermiculite and inorganic heat resistant fibrous material.

3. Weld quality assurance - Wikipedia

   en.wikipedia.org/wiki/Weld_quality_assurance

   Inline coherent imaging (ICI) is a recently developed interferometric technique based on optical coherence tomography [8] that is used for quality assurance of keyhole laser beam welding, a welding method that is gaining popularity in a variety of industries. ICI aims a low-powered broadband light source through the same optical path as the ...

4. List of railroad truck parts - Wikipedia

   en.wikipedia.org/wiki/List_of_railroad_truck_parts

   An axlebox, also known as a journal box in North America, is the mechanical subassembly on each end of the axles under a railway wagon, coach or locomotive; it contains bearings and thus transfers the wagon, coach or locomotive weight to the wheels and rails; the bearing design is typically oil-bathed plain bearings on older rolling stock, or roller bearings on newer rolling stock.

5. Hopper car - Wikipedia

   en.wikipedia.org/wiki/Hopper_car

   A hopper car (NAm) or hopper wagon (UIC) is a type of railroad freight car that has opening doors or gates on the underside or on the sides to discharge its cargo. They are used to transport loose solid bulk commodities such as coal , ore , grain , and track ballast .

6. Welding - Wikipedia

   en.wikipedia.org/wiki/Welding

   Welding also requires a form of shield to protect the filler metals or melted metals from being contaminated or oxidized. Many different energy sources can be used for welding, including a gas flame (chemical), an electric arc (electrical), a laser, an electron beam, friction, and ultrasound.

7. List of bridge failures - Wikipedia

   en.wikipedia.org/wiki/List_of_bridge_failures

   Following the collapse, PennDOT ordered reviews of structural adequacy for five other bridges with similar designs to the Fern Hollow Bridge immediately; those five bridges were found to be in "fair" condition at their last inspections. Replacement bridge opened 20 December the same year. Loay-Clarin Bridge Loay, Bohol: Philippines: 28 April 2022