safe working voltage to ground

例句：

1. 1.The safety of the workers is a top priority for the company.
   工人的安全是公司的首要任务。
2. 2.The electrical equipment must be designed with safety in mind.
   电气设备必须以安全为设计考虑。
3. 3. The engineers ensured that all safety measures were in place before starting work.
   工程师们确保在开始工作前所有安全措施都已到位。