paberi pinnatugevuskatse, paberi pinnatugevustest, paberi pinnatugevuse mõõtmine vahaga
test that is used to measure the pick resistance of papers, katse, mis on kasutusel paberi pinnatugevuse mõõtmiseks, test that use on paper and board to measure surface strength, or to measure how well the fibers are attached at the surface
