a short earthenware pipe on the top of a chimney to increase the draft.
The invention also provides a method for manufacturing the artificial lung which mainly includes a coating technics of the hollow fibre and gradient earthenware pipe.
a short earthenware pipe on the top of a chimney to increase the draft.
The invention also provides a method for manufacturing the artificial lung which mainly includes a coating technics of the hollow fibre and gradient earthenware pipe.