The intrinsic properties of the process result in apertures with a trapezoidalcross-section, which enhance paste release.
工艺的内在特性，导致孔内形成梯形断面，这有助于锡膏释放。
2
The mode dispersion characteristics and cut-off properties of rib waveguide with trapezoidalcrosssection are investigated.
变换伽辽金法对具有梯形截面脊形光波导的本征模式特性作了分析。
3
Using the generalized coordinates method, fundamental equations for the restrained-torsion of thin-walled box girders of trapezoidalcrosssection are derived.