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2. Materials for use in vacuum - Wikipedia

   en.wikipedia.org/wiki/Materials_for_use_in_vacuum

   Lubrication of moving parts is a problem for vacuum. Many lubricants have unacceptable outgassing rates, [5] others (e.g. graphite) lose lubricating properties. Vacuum greases are greases with low outgassing. Ramsay grease is an old composition of paraffin wax, vaseline and natural rubber, usable up to about 25 °C, for low vacuums to about 1 Pa.

3. Hard suction hose - Wikipedia

   en.wikipedia.org/wiki/Hard_suction_hose

   5-inch (13 cm) flex suction hose with Storz fittings, mounted on an engine. Flexible suction hose (Flex suction or suction hose), not to be confused with hard suction hose in U.S., is a specific type of fire hose used in drafting operations, when a fire engine uses a vacuum to draw water from a portable water tank, pool, or other static water source.

4. Büchner flask - Wikipedia

   en.wikipedia.org/wiki/Büchner_flask

   The short tube and hose barb effectively act as an adapter over which the end of a thick-walled flexible hose (tubing) can be fitted to form a connection to the flask. The other end of the hose can be connected to source of vacuum such as an aspirator, vacuum pump, or house vacuum. Preferably this is done through a trap (see below), which is ...

5. Brazing - Wikipedia

   en.wikipedia.org/wiki/Brazing

   Vacuum furnaces is a relatively economical method of oxide prevention and is most often used to braze materials with very stable oxides (aluminum, titanium and zirconium) that cannot be brazed in atmosphere furnaces. Vacuum brazing is also used heavily with refractory materials and other exotic alloy combinations unsuited to atmosphere furnaces ...

6. List of polyurethane applications - Wikipedia

   en.wikipedia.org/wiki/List_of_polyurethane...

   Polyurethane foam is widely used in high resiliency flexible foam seating, rigid foam insulation panels, microcellular foam seals and gaskets, durable elastomeric wheels and tires, automotive suspension bushings, electrical potting compounds, seals, gaskets, carpet underlay, and hard plastic parts (such as for electronic instruments).

7. The best stationary bikes for seniors in 2025 - AOL

   www.aol.com/lifestyle/best-stationary-bikes...

   The Fitnation Flex Bike Ultra is the perfect solution. As the most compact bike in our roundup, it delivers a versatile and convenient workout experience without taking over your home.