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。
When brushing the wall or painting layer (layer Plastering) a crack, and crack it with the extension of the wall coating integrity to ensure that no cracks, the new wall as long perfect.
当被涂刷的墙面或粉刷层(抹灰层)出现龟裂时，它就随着墙面开裂而延伸从而保证涂层完整不开裂，令墙面长久完美如新。
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