sentences:  The M756 was a specialized pipeline repair vehicle, the M763 was designed for telephone line repair, and the M764 was a specialized earth-boring and pole-setting variant.The versatility of the pattern was perhaps shown best in its usage as an armored "gun truck" for patrol duties and convoy escort.The simplest examples were produced by simply placing an existing light gun mount directly onto the cargo bed of the truck, and securing it in place.