By two double-mediate layer method, using developed welding materials and technology of forced arc molding, butt joining tests of high manganese steel with rail steel are completed.

This standard covers the procedures for the heat joining of pipe and fittings made from polyolefin materials utilizing either the socket or butt fusion methods.

An interface formed by joining the ends of two optical fibers in a coaxial (in-line) butt joint for direct fiber-to-fiber transmission.