00:44
Colloidal Silica
00:38
Intermediate frequency melting furnace for steel scrap melting
00:40
Lost wax casting production line electric heating dewaxing machine
00:27
Colloidal Silica for Investment casting,polishing
00:23
Refractory material quartz sand for Investment.
00:24
Casting equipment open type sand raining machine
00:23
Calcined kaolin,chamotte sand,muright sand,ziron sand
00:35
OBT Refractory material mullite sand 200mesh 22S 35S
00:11
Comparison of OBT mullite powder and others
00:29
How to choose colloidal silica for investment casting.
00:43
How mullite sand is produced
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OBT Refractories manufacturer：main products：mullite sand/colloidal silica/casting machine.
We will show product testing, use process, relevant information of OBT, etc.
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