我们使用的气筒常因为牛皮碗松而打不进气,使人感到不方便,即便是修完后还觉得往复费力。根据经验,我把牛皮碗换成O形密封圈(见图),再改装一活塞,在活塞底端钻φ3mm的6个出气孔。当活塞上提时,O形密封圈便随活塞底托面上移,空气从筒体上部与活塞周围的间隙和6个孔进入 We often use the gas cylinder because of leather bowl loose and do not enter the gas, people feel inconvenient, even after finishing feel still complex. As a rule of thumb, I replaced the cowhide bowl with an O-ring (see picture), modified a piston and drilled 6 holes at φ3mm at the bottom of the piston. When the piston is raised, the O-ring will move upwards with the bottom surface of the piston. The air enters through the gap around the upper part of the cylinder and the piston and six holes