You can also gauge how fast the bar is filling up, so can roughly estimate how long it's going to take for the whole thing to finish.
你也可以目测进度条的前进速度，大概估计出还需要多久才能全部搞定。
2
The pressure gauge is protected by a glycerin filling against pressure peaks condensed water and the ingress of water during cleaning.
丙三醇填充物保护压力表在压力峰值、冷凝水和清洗过程中的水入侵时免受损害。
3
Single - or multiple leakage test, by suppressing media filling quantity is small, if the tube bundle leakage, easy to from the pressure gauge on the fast show pressure drop.