1. Ukuqaliswa kwe-Electric Flange Ventilation Butterfly Valve: I-valve yombane ye-flange ye-ventilation ye-ventilation inesakhiwo esihlangeneyo, ubunzima obulula, ukufakwa okulula, ukuchasana kokuhamba okuncinci, izinga lokuhamba okukhulu, ligwema impembelelo yokwandiswa kweqondo lokushisa eliphezulu, kwaye kulula ukuyisebenzisa. Kwis...
Funda ngokugqithisileyo