ground block in a sentence

1. The drop is then connected to the house where a ground block protects the system from stray voltages.
2. In 1856 57 an improvement over speculum mirrors was invented when Karl August von Steinheil and L閛n Foucault introduced the process of depositing an ultra thin layer of silver ( silvering ) on the front surface ( first surface ) of a ground block of glass.
3. There were the promised pieces of cable, 4plastic wire ties, a compass, 4 lag screws, a ground block, 15 feet of ground wire, 25 feet of phone wire, a 6-foot video cable and a dual connector for the phone so that DirecTV could monitor the receiver for billing purposes.
4. There were the promised pieces of cable, four plastic wire ties, a compass, four lag screws, a ground block, 15 feet of ground wire, 25 feet of phone wire, a 6-foot video cable and a dual connector for the phone so that DirecTV could monitor the receiver for billing purposes.
5. It's difficult to find ground block in a sentence.