[自动加载事件](%E8%87%AA%E5%8A%A8%E5%8A%A0%E8%BD%BD%E4%BA%8B%E4%BB%B6.md) [tra_close 关闭载体](tra_close%E5%85%B3%E9%97%AD%E8%BD%BD%E4%BD%93.md) [tra_val 获取载体属性](tra_val%E8%8E%B7%E5%8F%96%E8%BD%BD%E4%BD%93%E5%B1%9E%E6%80%A7.md) [tra 打开新载体](tra%E6%89%93%E5%BC%80%E6%96%B0%E8%BD%BD%E4%BD%93.md)