在锅炉未点火启炉之前，采用液压马达助力装置主动提拉安全阀阀杆，使安全阀开启。

Before boiler working, pull the haulm of safe valve by hydraulic motor set until the safe valve spring.

youdao

在锅炉未点火启炉之前，采用液压马达助力装置主动提拉安全阀阀杆，使安全阀开启。

Before boiler working, pull the haulm of safe valve by hydraulic motor set until the safe valve spring.

youdao