保护环探测器的英文

• guard-ring detector

• 保护:    protect; defend; guard; safe ...
• 环:    ring; hoop
• 探测器:    finder; detector; seeker; so ...
• 保护环:    guard ring; protection ring; ring of protection
• 保护环境:    conservation; environmental protection; protect environment; protect the environment against pollution; to protect the environment; when people put the environment first, development will last