求翻译：2.3 BHE换热器进行压力测试使用的气体是由气体供应商提供的，提供的气体是14Mpa的集装格瓶装气体，每组15瓶，通常每天要更换3-4组，这样导致测试需经常停下来以更换气瓶。甚至有时由于高压气体的供应没有跟上，将导致测试完全停下来。是什么意思？

2.3 BHE heat exchanger pressure test using a gas is provided by the supplier of gas, gas is provided by 14Mpa bulk bottled gas, each group of 15 bottles, usually every day to replace the 3-4 group, which led to test regular stop to replace the cylinder. Sometimes even because of the high pressure gas supply has not kept pace with, will cause the test to a full stop.