2-1 Flow Diagram of the Asphalt Blowing Process . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
2-2 Flow Diagram of the Asphalt-Saturated Felt Production Process . . . . . . . . . . . 2-6
2-3 Flow Diagram of the Organic Shingle and Roll Manufacturing
Production Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
4-1 Distribution of Facilities by Sales . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10
4-2 Distribution of Facilities by Employment . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10
4-3 Distribution of Companies by Sales . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16
4-4 Distribution of Companies by Employment . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17