| 摘要 |
PCT No. PCT/GB92/01356 Sec. 371 Date Jul. 8, 1994 Sec. 102(e) Date Jul. 8, 1994 PCT Filed Jul. 23, 1994 PCT Pub. No. WO93/02552 PCT Pub. Date Feb. 18, 1993.A dropleg row crop sprayer senses boom height and tilt from ground-contacting droplegs signalling through potentiometers to a boom control mechanism. The droplegs follow crop row wandering through a driven carriage. Dropleg attitude is assisted by a cam control system. The boom also has a passive suspension system including damped frictional abutment of boom portions. A signal actuator controls boom attitude. The spray direction is fore/aft of the row.
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