All high points of each section treated shall be properly vented for airescape.
每部份处理管道的所有高点都应适当通风以便空气排出。
2
Don not let airescape around your lips and control the air flow well. Try many times, and your will succeed.
注意嘴型不要漏气了，好好控制一下气流，多多尝试。
3
Tip the bottle and jar enough to let a little airescape from the bottle so that the liquid is now up in the neck of the bottle and level with the water in the jar.