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2. ECE Regulation 90 - Wikipedia

   en.wikipedia.org/wiki/ECE_Regulation_90

   R90 calls for linings to be tested for speed sensitivity, cold performance, and replacement Brake pads and brake shoes are permitted to deviate from the frictional characteristics of their original-equipment counterparts by not more than 15%. [2] In addition, R90 requires tamper-evident, sealed packaging for replacement brake linings. [1]

3. Braking distance - Wikipedia

   en.wikipedia.org/wiki/Braking_distance

   The type of brake system in use only affects trucks and large mass vehicles, which cannot supply enough force to match the static frictional force. [1] [Note 2] The braking distance is one of two principal components of the total stopping distance. The other component is the reaction distance, which is the product of the speed and the ...

4. S-cam - Wikipedia

   en.wikipedia.org/wiki/S-cam

   Generally speaking, a tractor trailer requires more brakes than a typical vehicle, so making the brakes as simple and as cost effective as possible is very important. [citation needed] S-cams are very efficient at keeping brakes maintained because as the brake pad wears, the S-cam rotates more and causes the pads to further.

5. WVA number - Wikipedia

   en.wikipedia.org/wiki/WVA_number

   WVA numbers (Waren-Vertriebs-Artikel-Nummern) are a reference and assignment system for brake linings, clutch facings, brake shoes and other friction materials which will especially be used in road vehicles but also in mechanical engineering.

6. Mean effective pressure - Wikipedia

   en.wikipedia.org/wiki/Mean_effective_pressure

   Mean effective pressure is also useful for initial design calculations; that is, given a torque, standard MEP values can be used to estimate the required engine displacement. However, mean effective pressure does not reflect the actual pressures inside an individual combustion chamber – although the two are certainly related – and serves ...

7. Are doctors overtreating early-stage breast cancer? Is active ...

   www.aol.com/doctors-overtreating-early-stage...

   Cancer is typically treated with surgery, radiation and sometimes chemotherapy. But a new study suggests this standard protocol might not be necessary for a common form of early-stage breast cancer.