509.John will call you in advance to tell you when and where to meet( )

428.YOU [ ] USE EAR PROTECTION WHEN YOU ARE NEAR AN ENGINE THAT IS IN OPERATION ( )

427.Make sure that the arrow points in the direction of the fuel flow( )

426.底漆层厚度必须介于 05 毫米到 06 毫米之间。( )

425.Use an oil can to lubrication the turnbuckle ( )

424.Vertical pages rather than horizontal are preferred for all types of publication ( )

423.Replace nuts and washers if removed during inspectionDo not reuse ( )

422.将旁通活门和排放活门同时拆解。 ( )

421.The slow moving , high pressure air from the compressor is fed into the combustor or burner where it is mixed with a highly flammable fuel and ignited( )

420.Every time he comes up with a new idea, he writes it down in his notebook ( )

419.确信每个电门下方的琥珀色的 VALVE CLOSED 灯关闭。 ( )