sealed instrument
1.A document sealed as an instrument of bond, contract, or conveyance, especially relating to property.
2.The product of electric furnace fittings including:micro-computer program temperature control instrument、refractory brick(ultra-light weight energy saving brick)、resistance wire 、electroheat belts、electrical heat tube、silicon carbide rod 、furnace bottom plate、muffle tank、vacuum sealed fan、wind wheel、axis、substructure、bin seat、flat shape plate、box、panel、weatherstrip plate、return air plate、bin、connection box、educe rod、thermocouple、thyristor、porcelain pipe、crucible、furnace chamber、furnace frame、charging bin、substructure、pit furnace cover lifter framework(sole design) and otherwise.
