Nws txais TDF-K40s solenoid valve, uas muaj qhov yooj yim thiab zoo nkauj tsos Lub cev tseem ceeb yog ua los ntawm 4 hli carbon steel phaj, thiab cov khoom txhawb nqa yog ua los ntawm 14 # channel steel Cov qauv yog compact; tuaj yeem raug tshem tawm thiab cov kev taw qhia tuaj yeem tig tau, uas yooj yim rau kev thauj mus los thiab kev teeb tsa;