介绍了一项最新建材专利技术中低强度等级混凝土掺合料技术。
A new building material patent: concrete mixed material with middle and low strength is invented.
由于对这种钢丝采用特殊的拉延专利技术进行加工处理，因此它是一种具有高耐磨性、高断裂强度和高弹性的钢丝。
The wire is engineered with a special patented drawing process, resulting in a high wear, tear resistant and extremely elastic wire.
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