Surface Flow Control

Surface Flow Control is also listed under the following categories: Standard Yellow Pages Heading (SYPH) Categories:

• Engineers
• Bridge, Tunnel & Elevated Highway
• Metals Service Centers & Offices

North American Industry Classification System (NAICS) Categories:

• Highway, Street, And Bridge Construction
• Metal Service Centers And Other Metal Merchant Wholesalers
• Engineering Services

Standard Industry Classification (SIC) Categories:

• Bridge, Tunnel, And Elevated Highway Construction
• Metals Service Centers & Offices
• Engineering Services