safety circuit meaning in English

安全电路
安全回路
保安电路
保护电路

Numerical control ultrasonic wave washing machine of medical use the international advance ics , mpcs , safety circuits and digital indicators
医用数控超声波清洗机采用国际上最先进的集成电路、微处理电器、保护电路及数码显示。
With the design of essential safety circuit , the press instrument can be used in coal mine safely . besides reading press data from the portable press collector through serial port , processing press data and putting data into the database , the data processing software for pc can print data in report and graph forms . the software can also visit , query and edit the records in the database
本论文所设计的上位机数据处理软件可以通过串口读取压力手抄器中的压力数据，经过处理后保存于数据库中，并能以报表和曲线图的形式打印出来，便于统计和查阅，而且实现了访问、查询和编辑数据库中的记录等功能。