The utility model has the advantages of free disassembly, assembly and adjustment, freevariation and deformation of width, convenient operation, dismountable performance and convenient portability.
其优点是可自由拆装调节,宽度可自由变化和变形,使用方便,可拆卸,便于携带。
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A free science library and personal learning tool that currently concentrates on genetics, the study of evolution, variation, and the rich complexity of living organisms.