| 1. | This tester is provided with a "guard" terminal to prevent errors due to surface leakage .
本检验仪表装有保护环电路接头，用以纠正因表面漏电而造成的误差。 |
| 2. | Machine tools ; multi - spindle heads ; protection rings type a
机床.多轴头. a型保护环 |
| 3. | Two - fiber bi - directional path protection ring
二纤双向通道保护环 |
| 4. | Two - fiber unidirectional path protection ring
二纤单向通道保护环 |
| 5. | Four - fiber ms shared protection ring
四纤双向复用段共享保护环 |
| 6. | Two - fiber ms shared protection ring
二纤双向复用段共享保护环 |
| 7. | Shared protection ring
共用保护环 |
| 8. | Hinged covers ; circular shape with protection ring and surface coated ; dn 500 and dn 600
具有保护环和表面涂层的圆形绞链式闸板.第3部分:额定 |
| 9. | It is obvious that , in general , guard rings should be on both sides of the pcb with plated - through holes
显然，一般情况下，在pcb的上下表面都应设计保护环，二者通过金属化孔相连。 |
| 10. | In applications where high impedances and very low currents are involved a guard ring may be used to minimize the effects of low insulation resistance
保护环用在那些高阻抗或电流非常微弱的电路中，用于减轻因绝缘电阻不够高而产生的（漏电）问题。 |
