Instead of naming it a submersible, the word "deep" is deliberately added to the name. What does this mean?

It shows that Stark's original intention of inventing this device was to detect deeper sea areas, collect various data in deep sea areas, and explain that its pressure resistance and other capabilities are all designed and built according to high standards.

In other words, if you want to test the performance of this thing after it is launched in the water, verify whether its performance is as designed

"Cheater Players in Marvel" EP1972. The plan is in hand, please wait a moment,

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