| 摘要 |
<p>1,131,482. Conveying mineral stone. UNDERGROUND MINING MACHINERY Ltd. 18 Sept., 1967 [29 Sept., 1966], No. 43596/66. Heading B8A. Stone contained in a hopper secured to the top flanges 5 of box 2, falls on to the base 1 of the box and is discharged therefrom by blade 8 rotated by a variable-speed hydraulic motor 10 secured beneath the base 1. The discharge is made left and right past adjustable gates 4. Base 1 is lined with a hard steel.</p> |
