ditrigonal scalenohedral class
复三方偏三角面体类
on Deviation Angle of Retlected Beam in Quasi-tetrahedroid Corner Cube Prism
准四面直角体棱镜出射线偏角的研究
The Total Shift and Evolution of the Yangze River Delta Container Port System;
长三角集装箱港口体系的偏移增长与演化模式
the base of a triangle, pyramid, etc
三角形的底边、 角锥体的底面等.
an octahedron with eight equilateral triangles as faces.
有八个正三角形面的八面体。
a tetrahedron with four equilateral triangular faces.
有四个等边三角形面的四面体。
Any of several forms of crystal with trapeziums as faces.
偏方三八面体任一种各面均为不规则四边形的水晶体
the trigonometry of spherical triangles.
球面三角形的三角学。
deflection angle
偏角;偏角;偏离角;偏斜角;偏转角;变位角;致偏角
spherical trigonometry
球面三角 (法,学)
cocked hat ; hat with the brim turned up on three sides
三角帽（帽檐三面卷起的）.
a polyhedron having a polygonal base and triangular sides with a common vertex.
有一个多边形底面和有一个共同顶点的三角形侧面的多面体。
Two opposite corners of this rhomb contain three obtuse angles of 101°55'.
菱面体的两个对顶包含着三个101°55'的钝角。
Each of these perfect polyhedra would be in turn composed of triangles.
每一个理想的多面体是依次由三角形组成。
Effect of horizontal conductive solid wall on natural convection in a porous triangular cavity
导热壁面对三角形多孔腔体内自然对流的影响
3-axle Linkage CNC Boring and Milling Machine Processes Multi-angle Space Plane of Cutting Head Body
三轴数控镗铣床加工截割头体多角度空间平面
a polyhedron whose vertices all lie in one or the other of two parallel planes; the faces that lie in those planes are the bases of the prismatoid.
顶点都在一个平面或两个平行的平面上的多面体；位于那些平面上的面是旁面三角台的底部。
tetrahedral pentagonal dodecahedro
四面体式五角十二面体