检索结果 - communication ((using hat) or (((using cobalt) or (using hands)))) directional database index*

你的搜索 - communication ((using hat) or (((using cobalt) or (using hands)))) directional database index* - 没有匹配的资源。

也许你应该尝试一些拼写变化:
directional database » dimensional database , dimensional databases , relational database
database index » database indexing , databases induced
using cobalt » using cobol , using compact , using cold
using hands » using hand , using landsat , using harris
using hat » using heat , using what , using hats

You may be able to get more results by adjusting your search query.

Performing a fuzzy search may retrieve terms with similar spellings: communication ((using hat) or (((using cobalt) or (using hands)))) directional database index~.
If you are trying to use Boolean operators, they must be ALL CAPS: communication ((using hat) OR (((using cobalt) OR (using hands)))) directional database index*.