| 摘要 |
<p>The trolley is for use in an agricultural greenhouse. It has a chassis (1) with pairs of front wheels (8) and rear wheels (9) and working platforms (3, 4, 5) fixed on the chassis, at different levels. A drive wheel (17) carries a pinion (16) which drives a chain (15), in turn driving a pinion on the shaft of one of the wheels (8, 9). The drive wheel diameter is sufficient for it to be operated from all the platforms. The wheel pairs (8, 9) are formed by rollers (10) extending across the chassis and with flanges or discs (11) of greater diameter.</p> |
