psi ball
psi球
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The air was held in a reservoir and when the pressure reached 100 PSI, a modified irrigation valve was triggered to launch a tennis ball that had been stuffed down the barrel.
FORBES: The Supersonic Ping-Pong Gun
应用推荐
模块上移
模块下移
不移动