I could output ".chan data" to nuke for converting animation data. Houdini is able to output data so easily. Then the data could come and go Houdini to Nuke.😃
First of all, I should import data in CHOP and execute saving data channels with right click menu.
And I name .chan file.
Next, import that .chan data with "Import Ascii" in Nuke.
Then I could get the data from Houdini in Nuke.