31. In a threaded plumbing system , plugs have male threads. 32. Networking companies, whose mecca is the Bay Area, are the plumbing systems that link computers together. 33. The immediate causes are the same ones that would boost the pressure in any plumbing system . 34. Older plumbing systems may still have lead soldering. 35. They used lead widely in plumbing systems for domestic and public supply, such as feeding thermae. 36. What we have here is the linchpin of the plumbing system for the state of California. 37. "We're imaging the plumbing system of the earth," 38. The company constructs and services mechanical and electrical systems such as power, lighting and plumbing systems . 39. Plumbing fixtures are exchangeable devices using water that can be connected to a building's plumbing system . 40. Norwalk, Connecticut-based Emcor constructs and services mechanical and electrical systems such as power, lighting and plumbing systems .
