Hi guys I’m not very familiar with roughness of surfaces I just know very basic things, can somebody explain to me what they are asking me to check. I have roughness meter to measur this a mitutoyo sj400 and another roughness machine who can measur Rmr and Rmr rel. And Rmr0 Are they asking me to check if the presence of material is between 50 and 70 percent 5% under the maximum height?
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