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| 61. | pit drainage pump |
| 矿山排水泵 |
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| 62. | working pit edge |
| 工作帮 |
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| 63. | mountain pit-viper |
| 山铬铁头蛇 |
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| 64. | pit type grinding |
| 有坑磨木法 |
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| 65. | mud setting pit |
| 泥浆沉淀槽 |
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| 66. | pit bull terrier |
| 美国斗牛? |
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| 67. | smooth pit peach |
| 光核桃 |
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| 68. | pit prospecting method |
| 矿坑勘探法 |
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| 69. | secondary soil pit |
| 补助剖面 |
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| 70. | pit-volume recoder |
| 泥浆池泥浆量记录仪 |
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