This is very important for even weight distribution so that your aquarium does not crack.
这是非常重要的，即使重量分配，使您的水族馆不开裂。
Prestressed concrete elements can improve the crack resistance and stiffness, increase the durability of components, save material, and reduce weight, but the production process are more complex.
构件能提高构件抗裂度和刚度，还能增加构件的耐久性，节约材料，减少自重，但是其制作工艺也较复杂。
Methods: In the imaging of human lymphocytes, the back weight method and contract expand method were employed to wipe off the role noise and crack noise respectively.
方法：采用灰度倒数加权法以消除缝隙噪声，收缩再扩张法以消除斑点噪声，达到光滑细胞边缘之目的。
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