欧美国家地质填图历史悠久，地质填图一直被各国地调机构视为一项十分重要的工作。
There is a long history of geologic mapping in the Western countries, and geologic mapping is considered as a very impartment work by their geological survey bureaus.
与其他的转向车轴不同，半挂车在锁定装置被激活之前无需调直。
Unlike other steerable axles, the trailer does not have to be straight before the locking mechanism can be activated.
与其他的转向车轴不同，半挂车在锁定装置被激活之前无需调直。
Unlike other steerable axles, the trailer does not have to be straight before the locking mechanism can be activated.
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