其传感器内采用光桥式补偿光路，可以克服各种外界因素对测量产生的不利影响。
The sensor of the device uses light bridge to be the compensation structure, and this method can get rid of the bad influences caused by ambient conditions.
该方法无需共轴光路的测量环境要求，特别适用于桥梁、高速公路立交桥的静载挠度测量等工程应用。
It demands no circumstance requirements in common optical axis and is especially effective in flexibility measurement of bridge and cloverleaf junction.
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