bids are invited for test sieves test sieve 0.020 mm having stainless steel wire cloth and brass frame , test sieve 0.045 mm having stainless steel wire cloth and brass frame , test sieve 0.053 mm having stainless steel wire cloth and brass frame , test sieve 0.09 mm having stainless steel wire cloth and brass frame , test sieve 0.106 mm having stainless steel wire cloth and brass frame , test sieve 0.15 mm having stainless steel wire cloth and brass frame , test sieve 0.212 mm having stainless steel wire cloth and brass frame , test sieve 1.0 mm having stainless steel wire cloth and brass frame , test sieve 1.70 mm having stainless steel wire cloth and brass frame , test sieve 2.80 mm having stainless steel wire cloth and brass frame , test sieve 3.00 mm having stainless steel wire cloth and brass frame , test sieve 3.5 mm having stainless steel wire cloth and brass frame , test sieve 4.50 mm having stainless steel wire cloth and brass frame , test sieve 5.0 mm having stainless steel wire cloth and brass frame , test sieve 6.0 mm having stainless steel wire cloth and brass frame , test sieve 8.0 mm having stainless steel wire cloth and brass frame , test sieve 10.0 mm having stainless steel wire cloth and brass frame total quantity : 80