勘测

shuǐ lì kān cè

水利勘测

irrigation survey

kān cè xiàn lù

勘测线路

survey the route

dì xíng kān cè

地形勘测

topographical survey

shì jì yǒu guò duō cì kān cè hǎi yáng shēn dù de háng xíng

19世纪有过多次勘测海洋深度的航行。

There were many voyages to survey the ocean depths in the nineteenth century.