| 摘要 |
<PICT:1097276/C1/1> A housing, e.g. for microwave apparatus, comprises two spaced metal members 1, 2 and an insulating wall 3 joined at its ends to members 1, 2, the wall being thinner over the intermediate portion of its length than it is at and near the places where it joins the members. Wall 3 originally comprises a glass tube of uniform thickness which is first welded to metal members 1, 2 and then softened by heat and drawn into the form required. |
