A heater is disclosed which comprises an electrical insulating material surrounding an annular heating element configuration; wherein there is no casing surrounding an annular heating element configuration.
申请公布号
CA2264354(C)
申请公布日期
2007.11.06
申请号
CA19992264354
申请日期
1999.03.04
申请人
SHELL CANADA LIMITED
发明人
DE ROUFFIGNAC, ERIC;VINEGAR, HAROLD J.;WELLINGTON, SCOTT LEE;BIELAMOWICZ, LAWRENCE JAMES
