rugged ⪢⪢
The country's rugged geography makes administration from a central government difficult.
http://qindex.info/i.php?x=19288
◎◎◎ jagged ⪢⪢
rugged, ragged
http://qindex.info/i.php?x=3307
○○○ CH-47 Chinook ⪢⪢
Developed in the 1950s by Boeing Vertol, the CH-47 Chinook took its first flight in 1962 with the intention to provide heavy lift transport capabilities in rugged terrain and combat situations.
http://qindex.info/i.php?x=26417
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