测试筛φ200x 60hmm，打开6.7...
测试筛φ200x 60hmm，网眼打开8...
Test sieve φ200 x 60...
测试筛φ200x 60hmm网状网格打开...
测试筛φ200x 60hmm网状网13....
测试筛φ200x 60hmm，网状16m...
测试筛φ200x 60hmm，筛网19m...
测试筛φ200x 60hmm网状网格22...