摘要 |
The smoking tube (1) is made from wood with a larger hole in one end for filling with tobacco and a smaller hole at the other for drawing the smoke from the tobacco once it has been lit. The tube has three annular grooves containing rings (2) which can be rotated independently to expose one or two small air inlet holes each. The air inlets are 1.5 mm in diameter and at an angle of 50 degrees to one another.
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