[Retracted] Influence of Sulfur and Additives on Wear of Exhaust Valve Seat of Cylinder Head

<table class="table-group" id="tab11"><tr><td><table class="table"><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr class="thead"><td class="align_left">Chemical items</td><td class="align_center">CAS number</td></tr><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr><td class="align_left">Sulfur</td><td class="align_center">7704-34-9</td></tr><tr><td class="align_left">Lead</td><td class="align_center">7439-92-1</td></tr><tr><td class="align_left">Lead sulfate</td><td class="align_center">7446-14-2</td></tr><tr><td class="align_left">Potassium</td><td class="align_center">7440-09-7</td></tr><tr><td class="align_left">Thiophene</td><td class="align_center">110-02-1</td></tr><tr class="table-tr"><td colspan="2"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

Complexity

tab11

Table 11

Table 11: [Retracted] Influence of Sulfur and Additives on Wear of Exhaust Valve Seat of Cylinder Head 