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浙江省缙云县保健厂生产的85—1型防噪声耳塞,是第二军医大学海医系研制成功的一种新型泡沫塑料耳塞。它采用科学的发
The type 85-1 anti-noise earplug produced by the Jinyun County Health Care Factory in Zhejiang Province is a new type of foam earplug developed by the Department of Medicine of the Second Military Medical University. It uses scientific hair