- flat trajectory gun
- gun for surface fire
- 平射: flat fire◇平射炮 flat fire gun; flat trajectory gun; 平射武器 [军事] flat trajectory weapon
- 平射程: point-blank range
- 扁平射流: flat jet
- 平射弹道: direct trajectory; flat trajectory
- 平射舰炮: naval gun for surface fire
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