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Re: MSHA approves SubterraCom Wireless Tracking & Communication Device
The main difference I see is this system lacks video which means there is no chance for remote mining and as a company exec, if these 2 systems are close in price, I'd choose Act for that extra feature alone.
As for the number needed try the AO number and add 08 and 09 to the end as these have been passed over in the approvals.
