Kev xaiv
Txheem steel qhov rooj yog cais nyob rau hauv plaub theem: qib {} {{{{{{{{{{{8} {8} {8 '' '' '' siab tshaj plaws.
Txhua tus ntawm cov qib plaub ntu ntawm cov qauv ntawm kev sib tw thiab cov qauv tsim kom tau raws cov kev nyiam ua thiab cov zoo nkauj.Ne txheem steel qhov rooj siv tau cov qauv yog cov me nyuam yaus ua kom tiav thiab. Stile thiab Rail
Pom zoo yam tsawg kawg nkaus Gauge xav tau rau cov qib thev naus laus zis thiab ua qauv ntawm cov steel qhov rooj txheej txheem hauv cov lus 1
