在手柄前端的平钩上的钳口向里弯曲，形成与其相对的平钩相互吻合。
The vice jaw on the flat hook at the front end of the hand handle bends inwards matching the relative flat hook.
从理论上分析了纬平针织物钩丝的力学规律，提出了相应的物理模型和数学方程序，设计了新的钩丝测试方法。
The snag mechanism is analysed for plain - knitted fabric with proposed physical model and mathematical equation of snag processing. A new testing method is designed and results are introduced.
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