看看https://www.buildwithbmc.com/bmc/Products/Trusses%2C-I-Joists-

来源: wass 于 2019-12-15 20:30:00 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.