| 摘要 |
PCT No. PCT/GB93/01811 Sec. 371 Date Feb. 15, 1995 Sec. 102(e) Date Feb. 15, 1995 PCT Filed Aug. 25, 1993 PCT Pub. No. WO94/05864 PCT Pub. Date Mar. 17, 1994A pipe laying machine comprises a vehicle carrying a trench excavator followed by a pipe laying box running in the trench. Pipe lengths are stored in the pipe laying box one above another and the lowermost pipe length is periodically released by movement of bars into the bottom of the pipe laying box and is pressed by a ram into the mouth of the last laid pipe length. |
