网球是真空包装的吗?不是!罐装网球实际上采用的是加压包装。球罐里的气压要高于大气压力,这样就可以保证网球长期处于加压状态而不易漏气,网球开罐的时候听到“嗞”的一声实际是罐内气体喷出来了。在密封的球罐中,网球可以保存很长时间,包装严密的一两年都不成问题。如果开了就漏气很快了,静置的话一两个月之后就会有影响。如果遇到很激烈的比赛,一两小时里球内气压就会发生很大的变化。买塑 Is tennis packed in vacuum? No! Canned tennis actually uses pressurized packaging. Pressure in the tank is higher than the atmospheric pressure, so you can ensure that the tennis ball is under pressure for a long time and is not easily leaked. When the tennis can is opened, the sound of the “嗞 ” is actually emitted from the tank. In sealed cans, tennis can be stored for a long time, packed tightly for a year or two are not a problem. If you open a leak quickly, and then set aside for a month or two will have an impact. If you encounter a very intense game, an hour or two in the balloon pressure will change a lot. Buy plastic