3 Vaj Huam Sib Luag Hluav Taws Kub Rated Steel Qhov Rooj

3 Vaj Huam Sib Luag Hluav Taws Xob Hlau Rating Steel Rooj Rated Qhov Rooj Hollow Hlau Qhov Rooj thiab cov thav duab tau teev tseg (tej zaum vim tias cov hlau tuav tau zoo dua li ntoo).