January 01, 1970
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Each PTFE graphite yarn is covered with aramid fiber in its center
It is used for thermal insulation and heat insulation materials, and is an ideal substitute for asbestos cloth. Ceramic fiber cloth with copper wire (or stainless steel wire) is also available.
Outer ring grooving machine design for making groove of outer ring of spiral wound gasket, controlled by air pump. No longer expensive lathes need; one worker can see after more then 10 machines in same time.
