41. It has a central vacuum system with connections in each room of the house for the vacuum hose. 42. On vehicles with little or no engine vacuum, hydraulic systems are generally adopted in place of vacuum systems . 43. Some can be fitted with a vacuum system that ensures the extruded clay bodies have no entrapped air. 44. A vacuum system is put in place of the pin chains, which only touches the bottom of the can. 45. The whole optical assembly is put in a vacuum system that helps eliminate acoustic noise, dust and thermal effects. 46. The vacuum system will carry any tracer gas molecule into the analyzer cell of the magnetic sector mass spectrometer. 47. However CAD systems are mostly vacuum controlled and damage can occur to the vacuum system and to the CAD itself. 48. The second section of the process is a vacuum system that removes excess powder from uninked areas of the substrate. 49. The Postal Service was revising its use of these machines, and moving to a vacuum system instead of a blower. 50. Another is to investigate a central-vacuum system , whose valves usher dust and dirt to a central collection mechanism in the basement.
