trapezoid multi-start thread ring  梯形多头螺纹环

trapezoid single start thread ring  梯形单头螺纹环

sharp V-thread (full V-thread)  尖v形螺纹

V-thread (triangular thread)  三角螺纹; V形螺纹

anti-trapezoid ridge waveguide  倒梯形脊波导

area of trapezoid with curved edge  曲边梯形的面积

area, area side trapezoid  完形; 整体

circle trapezoid graphs  圆形梯形图

circular trapezoid graphs  循环梯形图

Combined trapezoid spray tray  立体传质塔板; 立体传质塔盘; 梯形立体喷射塔板

compound trapezoid formula  复化梯形公式

cqurved side trapezoid  曲边梯形

Curved member with trapezoid section  梯形断面曲杆

curvilinear trapezoid distribution  曲线梯形分布

double-trapezoid wave  双梯形波

equivalent dual-trapezoid curve  等效双梯形曲线

Generalized Trapezoid-shaped  广义梯形

generalized trapezoid-shaped GTS function  广义梯形函数

generalized trapezoid-shaped(GTS) function  广义梯形函数