upright barrel hook

例句：

1. 1. Theupright barrel hook is a crucial componentof the rifle's mechanism.
   直立式枪管钩是步枪机制中至关重要的组成部分。
2. 2. The hunter used the upright barrelhook to secure his bow.
   猎人使用直立式枪管钩来固定他的弓。
3. 3. Theupright barrel hook was designed to improveaccuracy and stability during long-range shooting.
   直立式枪管钩的设计是为了提高远距离射击的准确性和稳定性。