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The gun is fitted with a trunnion mounted telescopic sight for direct firing up to 3,000m.
The bearings for lower shaft consist of solid bushings fastened into trunnion , and are provided with oil-chamber and capillary felt, making them practically self-oiling and dust-proof.
The receiver is thicker, and it has a reinforced trunnion .
Although the compass carries no maker's marks, it is designed to fit across the transit's trunnions and has a pin that fits a hole on the transit.
The main frame of this machine is fitted at its base with trunnions , which work in a foundation plate.
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