It is common knowledge now that the way to make rubber hard and strong -- to "vulcanize" it, as we say -- is by heating it with sulphur.
使橡胶硬而结实的方法——也就
所说的“
化”——就
磺加热，这一点现在已经常识了。
化;化的化剂化机；热补机It is common knowledge now that the way to make rubber hard and strong -- to "vulcanize" it, as we say -- is by heating it with sulphur.
使橡胶硬而结实的方法——也就所说的“化”——就磺加热，这一点现在已经常识了。
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