variable refluctance geophone是什么意思 variable refluctance geophone在线中文翻译

variable refluctance geophone是什么意思，variable refluctance geophone在线翻译，variable refluctance geophone中文意思，variable refluctance geophone的中文翻译，variable refluctance geophone发音，variable refluctance geophone例句，variable refluctance geophone词组短语，variable refluctance geophone怎么翻译，单词variable refluctance geophone的意思