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• The Emperor Sea-mounts chain meets the Aleutian Trench at the northern end.

• Place the valves in position, and push them up into the valve bodies until the guide spiders are against the shoulders at the upper end of the valve bodies.

• The lockpin is screwed in through the valve body and normally bears up against the adjusting ring.

• The shaft sleeve is butted up against a shoulder or the shaft.

• When the program pin is seated against its stop button, ...