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average decibel level of cement crusher in gabon

Q400 noise dosimeters were set to moni­ tor an MSHA permissible exposure level PEL of 100 percent or an eighthour timeweighted average TWA8 of 90 dBA Specific parameters of this setting include Aweighting 90 dB Threshold and Criterion Levels 5­ dB Exchange Rate Slow Response and a 140 dB Upper Limit...As a leading global manufacturer of crushing equipment, milling equipment,dressing equipment,drying equipment and briquette equipment etc. we offer advanced, rational solutions for any size-reduction requirements, including quarry, aggregate, grinding production and complete plant plan.

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