Established the calculation model of waterproof layer tensile above bridge crack, compute a minimum extension and strength the waterproofing layer must have hi a certain width crack.
建立了桥面裂缝之上防水层张力的计算模型，有效地计算出桥面混凝土一定宽度裂缝上防水层须具备的最小延伸率和拉伸强度。
The concept of the composite foundation is that setting some reinforcement body in or adding some hi-strength material in natural foundation.
复合地基是指天然地基在地基处理过程中部分土体得到增强或被置换或在天然地基中设置加筋材料。
Hi-Lock pins and nuts are used at helicopters widely for their hi-strength, high fatigue values, build-in preload, self-locking and other characteristics.
高锁螺栓、高锁螺母具有高强度、高抗疲劳、预紧力安装、自锁等优良特性，它们在直升机结构中广泛应用。
Hi-Lock pins and nuts are used at helicopters widely for their hi-strength, high fatigue values, build-in preload, self-locking and other characteristics.
高锁螺栓、高锁螺母具有高强度、高抗疲劳、预紧力安装、自锁等优良特性，它们在直升机结构中广泛应用。
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