Dab tsi yog tawg-pov thawj coil

Kev tawg-pov thawj kauj yog dav siv hauv kev lag luam thee chemical, kev lag luam petrochemical, kev lag luam roj hmab, kev lag luam papermaking, kev lag luam tshuaj thiab lwm cov kav dej raws li qhov nruab nrab ntawm shunt thiab confluence los yog flow direction switching device.