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LIST OF TABLES<br />
2.1 Tannin Concentration and PH Value of Different Wood Types 10<br />
2.2 Tannin Content by Wood Type 11<br />
2.3 Woodworker Exposure to Airborne of Tannins 11<br />
2.4 List of Alloying Steel Element 16<br />
2.5 C and Cr Content of the Materials Tested 17<br />
2.6 Microscopically Pit Depth Measurements 25<br />
3.1 Carbon Steel Composition 35<br />
3.2 Tungsten Carbide Alloy Composition and Amount of Binders 35<br />
4.1 Corrosion Potential and Corrosion Current Density of Carbon Steel 54<br />
4.2 Corrosion Potential and Corrosion Current Density of Tungsten Carbide 58<br />
4.3 Mass Loss Measurement Data 64<br />
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