3056. Make sure that the arrow on the check valve points away from the ground supply duct

确保单向活门上的箭头指向远离地面供气管方向。

确保关断阀门上的箭头指向远离地面供应弯管方向。

确保调节阀门上的箭头指向偏离地面供应通道方向。

正确答案：A

设备系统操作理论翻译

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307. 每一页应标明原版本的日期,直至修订为止,并在修订后标明最新版本的日期。

306. ( ) THAT THE DUCT IS CORRECTLY ATTACHED TO THE FILTER

305. TYPE CERTIFICATE

304. 把温度计校正到摄氏刻度。

303. FLOODLIGHTS ( ) THE COCKPIT

302. Make sure that the two spigots at the bottom of the unit engage

301. 气流沿着缝翼的顶部和底部表面流动。

300. Rinse the basin with water

299. Although the airplanes addressed in this document are out of production,ABC continues to support them as outlined in our stated company polices

298. 使用孔探仪从内部检査燃烧室