· Laboratory Jaw Crusher 911 Metallurgist. The adjustment to coarse or fine crushing is made at the front end of the crusher. This machine is made in two sizes; the smallest has a jaw opening 2½ x 3 inches, weighs 170 pounds, and is listed at net; the larger size has a jaw opening 3 x 4 inches, weighs 280 pounds and is listed at net.
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