Tin solder on the top, tinplate on the bottom, tin foil inside.

顶上是焊锡，底下是马口铁，里面是锡箔。

He put the heart in the Woodman's breast and then replaced the square of tin, soldering it neatly together where it had been cut.

他把这心装进铁皮人的胸膛里，最后，再把割开过的地方，焊上一方马口铁，就这样一切完备了。