Soldering

Isaac Aaronax laughed heartily in joy and was pleased to have accepted Shi Tian as an apprentice. Never did he expect a momentous and impulsive decision would be his greatest one yet. 

"That's right, Nathan. The world shall know that a Mechanic is not to be underestimated either and that we are not just some oldie stuck in a workshop forever." Isaac Aaronax said, taking out a few metal scraps and solder. 

The solder is a fusible metal alloy and is extremely thin. The purpose of solder was to connect two different types of metals together by melting them which is known as soldering. 

"You should know what soldering is, right Nathan?" Isaac Aaronax turned to him and asked. 

Shi Tian nodded his head.