一 釺子綱的研究 釺子在金屬鑛山是一種主要的消耗材料,並且直接影響到岩的效率問题,因此在選擇釺子綱的時候,對於綱的性質必须加以要求,最適用的釺子鋼應該是硬度最大而脆性最小的,純粹的鋼不能用作釺子,必须在鋼內加入碳、錳等元素使鋼的硬度增加,其他矽磷,硫等元素,在鋼內所起的作用並不大所要求的成分較低,现在把各種元素對於鋼的品質的影響略述如 The study of a subcutanous prickly heat in the metal mine is a major consumable material, and has a direct impact on the efficiency of the rock, so in the selection of promelaus, the nature of the class must be required, the most suitable prickly heat Steel should be the largest hardness and brittleness of the smallest, pure steel can not be used as prickly heat must be added to the steel carbon, manganese and other elements to increase the hardness of steel, other phosphorus, sulfur and other elements, the role played in the steel Not large required composition is low, and now the various elements of the quality of steel outlined in