PCT No. PCT/FI86/00032 Sec. 371 Date Dec. 4, 1986 Sec. 102(e) Date Dec. 4, 1986 PCT Filed Mar. 27, 1986 PCT Pub. No. WO86/06038 PCT Pub. Date Oct. 23, 1986.A mattress construction for a pneumatic mattress track system, through which the mattress can withstand higher pulling forces, the transmission between drive wheels and mattress be made more efficient and the whole system made lighter.
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