etching test meaning in Hindi

Examples

1. Etch test for macrostructure and defect of steels
2. Method of oxalic acid etching test for stainless steels
3. Steel products - method for etch test of tower sample
4. Methods of acid etch test for transvese macro - structures of heat - resisting superalloys
5. Methods of acid etch test for longitudinal macro - structures of heat - resisting superalloy bars
6. Deep etch test