The change in pressure can be recorded by means of a pen arm on a rotating drum. 气压变化可以借助在转动的钟筒上移动的笔记录下来。
So, we think air pressure change is one of the main factors of aberration of observational daily change curve of tensometer. 因此认为气压变化是伸缩仪观测日变曲线畸变的主要因素之一。