| 摘要 |
<p>The system has a case for supplying respirable air to two operators by flexible tubes of small diameter. The tubes are connected to the system by quick action couplings. Two independent turbines generate an adjustable air flow for the operators, where the air flow is sufficient to ensure necessary safety requirements for the operators while controlling main values of air quality in the event of risks involved during exceedance of carbon-di-oxide and carbon monoxide values from a range of values.</p> |
