| 摘要 |
The connection device comprises a telescopic arrangement of two tubes (2, 3), with a compaction and guide piece (5) secured inside the end of the outer tube (3). A twin cone piece (1) for sealing the bottom end of the pipe (10) is secured to the outer tube by four round iron rods (4). Movement of the inner tube towards the cone piece will cause the bottom end of the pipe to be sealed, as well as bending the bottom ends of the iron rods to form a sharp point, which gives the bottom end of the pipe a smooth surface. |
