并导出了平底及锥形凹模内正挤空心件时单位挤压力的计算公式。
The formulas of extrusion for hollow parts in the square dies and the conical dies has been derived.
详细研究了衬底或者覆盖层是左手材料两种情况下，空心平板波导中的表面模。
Investigated were the surface modes propagating along a hollow dielectric slab waveguide with a left handed material (LHM) substrate or cover, respectively.
所述胶条模边是实心、空心或者夹心的耐高温塑胶胶条。
The strip mold edge is a solid, hollow or filled high-temperature plastic strip.
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