- main protection
- 主: host
- 保护: protect; defend; guard; safe ...
- 装置: installation; device; appara ...
- 保护，防护装置: guard
- 保护装置: abdeckvorrichtung; defensor; fender system; guard device; pd protective devices; protecting device; protecting equipment; protecting means; protection device; protection equipment; protection unit; protective equipment; protective gear; protector; shield
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