A strong beat signals to markets that this slumbering industrial giant is back.Diversified manufacturer 3M (MMM 19.64%) easily topped Wall Street's quarterly expectations and raised the lower end of its full-year guidance.Investors are rallying into the shares, sending 3M up 17% as of 11:15 a.m. ET.A big beat thanks to improving margins3M has required patience from investors, losing nearly half of its value over the past five years as it dealt with a series of liability lawsuits and reworked its business. B ...