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取脚踏車的打气筒一个(直徑小的比較好,抽气時不致太费力),用鋸鋸去头子。距这头顶端約2厘米的地方,鑽一小洞。剪一条寬約3厘米的膠皮条,兩头用橡皮膠粘住成一橡皮箍,套在金屬圓筒上,遮住小洞,代替普通抽气机活塞上的活門。另取橡皮塞一个,它的大小,以能有一大半塞入金屬圓筒为度。塞子小端,粘薄橡皮一塊,並留一小部分不粘住,以便通气,做抽气机的另一活門。橡皮塞中插长的10厘米的玻璃管一根,玻璃管要預先放在酒精灯上烧去稜角,以後玻璃管塞入橡皮管或橡皮塞中,才不会生橡皮碎屑,(若有橡皮碎屑,
Take a pump inflator (a small diameter is better, not too exhausting exhaust), with a saw to the head. Approximately 2 cm from the top of this head, drill a small hole. Cut a rubber strip about 3 cm in width, with rubber bands on both ends glued together into a rubber band and put on a metal cylinder to cover the holes instead of the valve on a conventional aspirator piston. Another rubber plug one, its size, to have more than half into the metal cylinder for the degree. Plug the small end, sticky rubber piece, and leave a small part of the non-stick, in order to ventilation, another valve to do aspirator. Rubber plug inserted in a 10 cm glass tube, the glass tube to be pre-placed on the alcohol lamp burned edges and corners, after the glass tube into the rubber tube or rubber stopper, it will not raw rubber debris, (if there is Eraser,