The confident estimation to the headframe and bed plate of drilling rig is done by this method,the computational solution is identic...

弥补了石油行业在无故障靠性评定方面的不。

Bed plate: Metallic plate in which bronze or steel knives are fitted, set dirrctly underneath the beater roll of the hollander .

在荷兰式机内下面的金属底床，它上面装上青铜或钢刀片。