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【11-25】Versi kesehatan kerja: Satu postingan per hari

2016-11-25View Original

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Pos ini terakhir diedit oleh Achuan pada tanggal 2016-11-27 pukul 10:08. 【11-25】Postingan harian mengenai kesehatan kerja: Konsentrasi maksimal karbon dioksida di tempat kerja pertambangan adalah ( )%. Ayo, berikan suara kalian!
Reply #22016-11-25
Konsentrasi maksimum karbon dioksida yang diperbolehkan di tempat kerja pertambangan batu bara adalah (0.). 5%)

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