If the set collar end hardness is lower than HRC40, should first on the end surface again a built-up welding hard alloy, after the polish repackaging.
如果固定环端面硬度低于HRC40，则应先在端面上重新堆焊一层硬质合金，经磨光后再装配。
The grain hardness of wheat, reflecting character of endosperm texture, is one of the most important determinants of milling, baking and end-use quality.
小麦籽粒硬度是胚乳质地的反映，它是国际通用小麦分类指标之一，与磨粉品质、食品加工品质关系密切。
The effects of different silane end-capped ratios and HTPB content on mechanical properties, hardness and surface dry time of the sealant were discussed.
探讨了烷氧基硅烷封端率及端羟基聚丁二烯的含量对单组分密封胶的力学性能、硬度及表干时间的影响。
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