metal pall ring, on packed tower, stainless steel or EQ. carbon steel, etc.
http://blog.cyworld.com/kt2004
http://cyworld.com/jet2004
sales@steeltiger.co.kr, steel :(쇠)금, tiger :(호랑이)호
http://blog.cyworld.com/kt2004
http://cyworld.com/jet2004
sales@steeltiger.co.kr, steel :(쇠)금, tiger :(호랑이)호
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