Steel.
Couplers differs from one model train to another depending on its manufacturer but within the scale there are often multiple coupler styles that you can change to depending on what you prefer.
couplers to connect 2 enging together for sale
same
A train made from gum is a Chew Chew train get it a CHEW CHEW train.
yes - by heating them
Porcine Associates specialize in the making of GPS and DG couplers. These "couple" (pair) your GPS and your autopilot functions. DG couplers only work with Naviad Devices.
The First bullet train was made in 1930
http://www.ozoptics.com/ALLNEW_PDF/DTS0033.pdf
The Janney coupler was named after Eli H. Janney who patented the invention in 1873. The Janney coupler was an improvement in railroad car couplers that became the standard for the railroad freightcar couplers.
Wide Variety of Couplers, Dividers Isolators & Circulators
A putlog scaffold consists of a single row of standards with the inner edge of the platform as close to the wall as is practicable. The standards are connected by a ledger fixed with right angle couplers and the putlogs are fixed to the ledgers using putlog couplers.
It was made in 1825