Manufacturing material of mechanical car stopper

Titan ingot x 12: mining manufacturing, material: Titan iron ingot x3, eternal soil x 1, eternal shadow x 1, eternal flame x 1.

Cobalt screw x40: engineering manufacture, material: cobalt ingot x2.

Polar Fur x2: Find Boulaygue Jiuxu in Dalaran business district with a thick land of 10 in the north, or go directly to the auction house.

Parts of iron puppet x 1: buy from Roxy Ramrocchi of K3 at a price of 3000G, and only after studying the drawings can you buy them.

Roxy Ramrocchi for Goblin mechanical piston x8:K3, unit price 1000G.

Source exhaust pipe x 1: same as above, unit price 1500G.