1. 采油树：derrick 井架 | Christmas tree 采油树 | crown block 定滑轮

2. 枞树：Christmas-tree 圣诞树枞树形的 | Christmas-tree 枞树 | chromalize 镀铬

3. 圣诞树枞树形的：Christmas-tree 圣诞树 | Christmas-tree 圣诞树枞树形的 | Christmas-tree 枞树

1. 圣诞树
A Christmas tree is a fir tree, or an artificial tree that looks like a fir tree, which people put in their houses at Christmas and decorate with coloured lights and ornaments.