桁是形声字，木为形，行为声。桁是梁上或门框、窗框等上的横木，引申泛指横木。
n. purlin ; joist ; ridge-pole
麦晋桁 John J. Mack ; John Mack
赛路里桁架 Serrurier truss
桁条 [建] purlin ; [建] stringer
拱形桁架 [建] arch truss ; trussed arch
钢桁架 [建] Steel Truss ; BK-HJ ; Steel Truss Structure
基座纵桁 bed-plate girder ; girder of foundation ; girder for seat
帆桁 [船] sail yard
桁架结构 Truss Structure ; trussed construction
旁底桁 bottom side girder
纵桁 longitudinal girder ; stringer plate ; Girder
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