| 摘要 |
PCT No. PCT/GB87/00341 Sec. 371 Date Jan. 19, 1988 Sec. 102(e) Date Jan. 19, 1988 PCT Filed May 18, 1987 PCT Pub. No. WO87/06792 PCT Pub. Date Nov. 19, 1987.A grass cutting machine has two forward cutting units (24) and one rear central unit (46). The mechanism at, for example, the margin of a golf green, provides a time delay between lifting or lowering of the front (24) and rear cutting units (46) which is determined by the distance travelled by the machine. In this way it is ensured that all unites start and stop cutting at the same reference point on the ground.
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