机务工程队安全目标是？

48.Cracks canhavea maximum length offive inches.

47.Makesurethat there areno leaks.

46.To remove thecover assembly(9),firstremove the four screws(10).

45.Polish the window pane with a soft cloth.

44.All personnel must fully know the safety precautions.

43.Donot exceed this speed with landing gear extended

42.If thecircuit breakeropens,de-energize the circuit.

41.Attach the panel tothe structure with the bolts

40.You cangainaccess tothe machinery by removing the cover

39.The flow of fluid throughthe valve must becontinuous.