When the leveling instrument came, he set up the tripod skillfully and looked around through the meter for a long time.

水平仪拿来了，他老练地架起了三角架，前后左右地张望良久。

youdao

When the leveling instrument came, he set up the tripod skillfully and looked around through the meter for a long time.

水平仪拿来了，他老练地架起了三角架，前后左右地张望良久。

youdao