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متالوژی::
مقاومت پیوند
Non-porous or practically so at cone 5, do not seriously over- burn at 12 cones higher, highly refractory (softening point at cone 31 or higher), bonding strength minimum 325 pounds per square inch.
Become dense at about 1275�C (cone 8), do not over-burn below 1425�C, bonding strength minimum 325 pounds per square inch or higher, softening point cone 29 or higher.
Non-porous or practically so at cone 5, do not seriously over-burn at 12 cones higher, highly refractory (softening point at cone 31 or higher), bonding strength minimum 325 pounds per square inch.
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