machines used in poultry and meat processing, namely, killing machines, namely, stunners and bleed trough machines; de-feathering machines in the nature of pickers; evisceration equipment, namely, draw machines and vent opener machines; cooling equipment, namely, conveyers with chill tank feature; mechanical cut-up machines, namely, deboners and skinners; gizzard harvesters; de-skinning machines; tenderizing machines; dye injection machines