pall ring data for packing

Pall ring, on packed tower (Surface Area & Free Space),
with data for packing,
Material : PP, Steel, PVDF(Teflon), PVC(C-PVC), etc.,
and Pall ring cruster,
http://blog.cyworld.com/kt2004
http://cyworld.com/jet2004
sales@steeltiger.co.kr, steel :(쇠)금, tiger :(호랑이)호