HYNB

UNT:mm
Tolerance:±0.5mm
Continuous tone
（连续声）

HYDGN

UNT:mm
Tolerance:±0.5mm
Warning tone
Continuous tone
Interrupted sound
(报警声+连续声+间断声)

BJ-1

UNT:mm
Tolerance:±0.5mm
Warning tone
（报警声）