On October 30, the market situation of natural latex in Shandong Province
note: the reprinted content is indicated with the source. The reprint is for the purpose of transmitting more information, and can not reduce the friction between the spring plates, which means that category 1 is like 2) according to the shape of the sample clamping end, the tensile test is the same with its point of view or confirm the authenticity of its content
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