好像沒有crawl space. 加拿大標準是200bp/m3, 當然越低越好。為什麽4就超標,是不同的計量嗎?
所有跟帖:
• 1 pCi/L = 37 Bq/m3 -pickshell- ♀ (0 bytes) () 10/18/2024 postreply 15:34:50
• 1 pCi/L = 37 Bq/m3 -pickshell- ♀ (0 bytes) () 10/18/2024 postreply 15:34:50
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