The spaces between the chunky wooden columns and beams match the standard sizes of timber boards, so they can easily be divided up into rooms.
粗实的木梁柱与标准尺度的木质板材相互配合，可以方便灵活的划分空间。
Bridge's metal structure from the main beam and side beams, divided into single-and dual-beam bridge girder bridge types.
桥架的金属结构由主梁和端梁组成，分为单主梁桥架和双梁桥架两类。
Nowadays, these light beams are divided into two kinds: one is hollow beam, such as Laguerre-Gaussian beam and high-order Bessel beam;
目前，具有轨道角动量的光束主要分为两大类：一、空心光束，例如拉盖尔高斯光束和高阶贝赛尔光束；
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