What is m-triangel?

As an AI language model, I'm not sure what you mean by "m-triangel." There is a possibility that you mean "m-Triangle," which is an American company that provides advanced engineering solutions for the medical, electronic, and aerospace industries. They specialize in designing and manufacturing custom components, subsystems, and instruments that require high precision and accuracy. Their expertise includes micro machining, ultra-precision diamond turning, and piezo-electronics.