| H 型合页 H type hinge | A two-leaf hinge shaped like 'H', used in doors and windows that require frequent removal and are relatively thin. |
| 合页 Hinge | General hardware in the QB/T 4595 series standard, including ordinary type, lightweight type, removable pin type, H-type, T-type, and double sleeve type. |
| 转动力 Operating torque | The force required to turn the hinge during rotation. This standard stipulates that the operating torque of the product shall not exceed the value specified in Table 3, and the rotation shall be smooth and flexible. |
| Life test apparatus Not mentioned | Equipment used for product life testing, with a test cycle of 10,000 times. |
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