单词	switch beam
释义	switch beam 转换梁
随便看	top bearing housing top bearing lock nut top bearing shaft nut top bearing shell Top be astonished at sth top beater Top be deceived in sb Top be found of gossip Top be frank with you Top be in the right top bell top belt top belt and cupola Top be master of oneself Top be much concerned about top bench top benching top-benching Top be on the defensive Top be overcome with fear Top be rude to sb Top best total of points Top be taken by surprise Top be under a curse top bevel