碳精棒常用于电弧灯.The stick of carbon is often used in an electric arc lamp.内阳极有两种材质,分别为不溶性碳精棒和含磷铜棒.The inner anode includes insoluble carbon and phosphorous - copper bar....
At every stage in the production there will be paperwork— forms to fill in, permissions to obtain, letters to write.在生产的每个阶段都有文书工作——填表格，报批，写信。By default permissions are inherited from the parent tab or page.默认设置是继承父栏目或菜单...
There are infiltration center on lava and agglomerates.在熔岩或集块岩上有渗漏中心存在.Aetna center on the second floor to take a look at it!安泰中心二楼去看一看吧!Our business center on second floor has computers, fax machines, and secretaries.我们...