बे लाबथिंनोहानाय जनथ्रआ थिखिनि गनाय हारखौ थोंजोङै सुयो गुबुनफारसे जाय खमायजायो जेब्ला बारलामायाव हेंथा थायो।
This portable instrument directly measures the peak flow rate which is otherwise reduced when there is obstruction of the airways.