托梁，承接梁穿过孔洞，如壁炉地面，到插梁末端能被固定的横梁。

A beam across an opening, such as a hearth, into which the ends of joists can be fitted.

youdao

托梁，承接梁穿过孔洞，如壁炉地面，到插梁末端能被固定的横梁。

A beam across an opening, such as a hearth, into which the ends of joists can be fitted.

youdao