|
91. | excavating and loading teeth |
| 挖掘装载齿 |
|
|
| |
92. | dig with a pick |
| 用镐挖掘 |
|
|
| |
93. | optimum height of cut |
| 最佳挖掘高度 |
|
|
| |
94. | excavation plan |
| 挖掘工程计划 |
|
|
| |
95. | quarried products |
| 冰川挖掘产物 |
|
|
| |
96. | tunnel boring works |
| 隧道挖掘工程 |
|
|
| |
97. | optimum depth of cut |
| 最佳挖掘深度 |
|
|
| |
98. | potato raising plough |
| 马铃薯挖掘犁 |
|
|
| |
99. | spiral cutter-head |
| 螺旋形挖掘头 |
|
|
| |
100. | visit the excavations |
| 参观挖掘现场. |
|
|
| |