按所采用的步骤，钢可以通过硬化来抵抗切削和磨损，也可以通过软化来允许机加工。
According to the procedure used, steel can be hardened to resist cutting action and abrasion, or it can be softened to permit machining.
软化剂的加入可以改善其硬度及加工流动性。
Its hardness and flow properties can be improved by adding softener.
聚合松香是松香深加工产品中的一个重要品种，具有软化点高、酸值高、抗氧化性好、粘度大等优点，广泛应用于高级油墨、粘胶剂及涂料等行业。
It has the advantages of high softening point, high acid value, good capability of anti-oxidation and high mucosity. Polymerized rosin is good used in high-grade printing ink, adhesives and dope, etc.
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