abstract:つ, in hiragana, or ツ in katakana, and the variant form ㋡, is one of the Japanese kana, each of which represents one mora. Both are phonemically although for phonological reasons, the actual pronunciation is .
The design and production of high performance jet engines are key technologies that China hasn't mastered, and there is speculation that Beijing wants the Su-35 engines to power its stealth fighters.