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１制作（１）在一普通洗气装置上加装两支玻璃阀门，如图１（２）制作一个供收集气体时用的底座。取５～１０ｃｍ厚的包装用泡沫塑料，截成正方形，其边长比集气瓶直径大４～５ｃｍ，在中央处挖一个同瓶口一样大小的圆孔，深度比瓶颈略长为宜（不可把塑料挖穿，否则其厚度不够?
1 Production (1) Install two glass valves on an ordinary scrubber, as shown in Figure 1 (2) to make a base for gas collection. Take 5 ~ 10cm thick packaging foam, cut into squares, the side length than the gas cylinder diameter 4 ~ 5cm, dug in the center of the same size as the bottle hole, the depth is slightly longer than the bottleneck is appropriate ( Can’t dig plastics, otherwise its thickness is not enough?