新浇筑混凝土的收缩必须已经完成，否则以后高强彩色水泥自流平可能会因为混凝土自身收缩开裂而导致开裂。
The new pouring of concretes hrinkage must have been completed, or after the cement-based self-leveling may be due to theirs hrinkage cracking of concrete caused by cracking.
热塑性工程塑料包装箱由于设计和加工工艺不当，在各种使用环境中易导致产品应力集中而开裂。
In some of usage environment, the engineering thermoplastics packaging case can cause stress concentration and cracking because of the bad design and processing technology.
众所周知，建筑物在经过多年的使用后总会产生一定的沉降，而不均匀沉降往往会导致建筑物塌陷、开裂并严重影响使用。
As we all know, after years of use, buildings will always have a certain post-settlement, which often led to uneven settlement of the building collapse, cracking and seriously affect the use.
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