In estonia three types of shale tar have been used as alternatives to anthracene oil or carbolineum . 在爱沙尼亚，已有三种页岩焦油用作蒽油或氯化蒽油的替换物。
2.
Pairs endurance - most throws from a 2 meter circle . no catch required between throws . partners alternate throws and retrieval 对耐力-最从2米圆扔。要求在之间的没有钩子扔。搭挡替换物扔并且检索。
3.
Standard test method for determining femoral head penetration into acetabular components of total hip replacement using clinical radiographs 使用临床射线摄影测定全部髋替换物的股骨头穿透进髋组件的标准试验方法
