2. Machinery for mining, construction and public works, such as cutting machine, surface mine laying machine, grinder, etc., including a working end with lateral release to reduce resistance to propulsion and wear; There, job analysis can also have a generally flat front surface to improve performance in a scam or other operation. This includes: (a) a seat base and an assembly end fixed to a secure knee front pad; (b) a removable base wear shell with a hole,The seat is a tester that matches the shape of the hole; and (c) a bra that detachably secures the base plate, which is an adhesive that is drawn into the base with a worn shell and stays at the base.
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