555 当进行活门测试的每一个步骤时,要确保没有渗漏

991、If there is no contamination in the fuel sample, continue the procedure.

990、If it is necessary()the cable tension more, use the turnbuckle.

989、 Hook the towing arm up to the nose gear.

988、head

987、Get access to the control unit through the opening in the side of the tank

986、front

985、FOLLOW

984、FLAT

983、face

982、Examine the static dischargers for bent and blunt pins.