The size of the Respirable Suspended Particulate Matter (R.S.P.M) in air is: हवा में तैरते हुए श्वसनीय सूक्ष्म कणों का आकार होता है:

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The size of the Respirable Suspended Particulate Matter (R.S.P.M) in air is: हवा में तैरते हुए श्वसनीय सूक्ष्म कणों का आकार होता है: