Marshall Excelsior Co., part of St. Louis-based Harbour Group, has acquired BASE Engineering Inc. of Canada. Terms were not disclosed. BASE, based in St. John, New Brunswick, designs and manufactures remote, automated emergency shutdown and operational controls for the liquefied petroleum gas (LPG) and refined fuels indsutries. It sells its products in North America, Europe and Australia. BASE's CEO and president, Steve Belyea, founded the company in 1996. He will continue those roles with BASE...