Unverified75% confidenceDecision RuleTime unknown
发射瞬间噪音应≤65dB,弹簧/离心式发射机在长距档常达75dB以上,胆小犬和幼犬会因发射声受惊而拒绝靠近机器
1
Sources
75%
Confidence
Long-term
Relevance
-
First Seen
Sources
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