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BUR Barbell collars were also stamped "BUR". In the early 1960s, the name "BUR" was removed from the plate design. The new plates included only the poundage. [20] This allowed for greater manufacturing standardization and helped keep costs (and prices) down. The name "BUR" continued to be stamped on the barbell collars until all production ended.
Collars are used to prevent plates from moving outward unevenly so that the lifter does not experience uneven force. The barbell is the longer version of the dumbbell that is used for free weight training and competitive sports, such as powerlifting, Olympic weight lifting, and CrossFit .
A joint lock is a grappling technique involving manipulation of an opponent's joints in such a way that the joints reach their maximal degree of motion and hyperextension.. In judō these are referred to as kansetsu-waza (関節技, "joint locking technique" [1]) and in Chinese martial arts as qin na, which literally means "catching and locking".
Two soldiers in a "crude north–south position". A pinning hold (also known as a hold down and in Japanese as osaekomi-waza, 抑え込み技, "pinning technique") is a general grappling hold used in ground fighting that is aimed to subdue by exerting superior control over an opponent and pinning the opponent to the ground.
On an independent-jaw chuck, each jaw can be moved independently. Because they most often have four jaws, the term four-jaw chuck without other qualification is understood by machinists to mean a chuck with four independent jaws. The independence of the jaws makes these chucks ideal for (a) gripping non-circular cross sections and (b) gripping ...
A men's Olympic barbell weighs 20 kg (44 lbs) with a shaft diameter of 28 mm and a length of 2200 mm, whereas a women's Olympic barbell weighs 15 kg (33 lbs) and has a shaft diameter of 25 mm with a length of 2010 mm. [20] [21] The distance between the sleeves, however, is the same for the men's and the women's bars at 1310 mm.