折线形屋架 segmental truss: 弓形梁; 弓形桁架roof truss: 人字桁架; 屋顶架; 屋顶木架; 屋架arch-shaped roof truss: 拱形屋架arched roof truss: 拱形屋顶桁架; 拱形屋架; 拱形桁架batten of roof truss: 屋架水平撑条下载手机词典可随时随地查词查翻译