A、 If a symbol or device is established for a valve or control, it shall be used for this type of unit throughout the manual. The symbols used should be shown and identified in legend a block on the schematic diagram.
B、 If a symbol or device has been set up to a valve or control, the equipment type will be referred, to as this symbol or device, throughout the manual. The legend block in the diagram displays or identifies symbols or device.
C、 If symbol or design is specified for a valve or control, this type of device is used throughout the section of the manual. The symbols used can be found and identified in the legend block on the schematic.
答案：A
A、 If a symbol or device is established for a valve or control, it shall be used for this type of unit throughout the manual. The symbols used should be shown and identified in legend a block on the schematic diagram.
B、 If a symbol or device has been set up to a valve or control, the equipment type will be referred, to as this symbol or device, throughout the manual. The legend block in the diagram displays or identifies symbols or device.
C、 If symbol or design is specified for a valve or control, this type of device is used throughout the section of the manual. The symbols used can be found and identified in the legend block on the schematic.
答案：A
A. The swivel nuts on both valves engage threads on an internal stem that loosens or draws tight the valve stem to a metal seat.
B. The rotating nuts on both valves are meshed with the threads on the inner valve stud, so that the valve stud is loosened or tightened to a metal valve base.
C. The swing nuts on both valves engage with the threads on the internal spool, allowing the spool to loosen or tighten to the metal seat.
A. Decide which hydraulic system you will pressurize.
B. The pressurized hydraulic system is the best.
C. Check the hydraulic system that you will pressurize.
A. 勤务氧气前,停止所有的加放燃油,液压系统的所有维修,以及所有使用易燃材料的程序,如清洁和除冰材料。
B. 充氧前,停止所有加油,修理燃油和液压系统,以及所有使用易炸材料的程序如清洁和除冰液。
C. 充氧前,停止所有加油,燃油和液压系统的所有维修,以及所有使用易燃材料的程序如清洁和除冰材料。
A. Do not make the pressure became less than (or more than)20 psi.
B. Do not let the pressure become less than (or more than)20 psi.
C. Do not let the pressure close less than (or more than) 20 psi.
A. 每章的正文之前应有目录,并以数字标注出段落标题。
B. 每节的正文之前应有目录,并以数字页面顺序列出段落标题。
C. 每章的正文之前应有目录,并以数字顺序列出段落标题。
A. Exterior Plates and Signs are required for ground servicing instructions, checks, warnings and cautions.
B. External Placards and Symbols are necessary for ground servicing instructions, inspections warnings and cautions.
C. Internal Plates and Markings are required for ground servicing instructions, reviews, warnings and cautions.
A. In order to revise,supplement an delete the printed maternal, a perpendicular black line must be use to identify the changed portion along the margin of the page
B. Whenever the printed matter is to be revised,replenished or updated mark a black cross on the right margin of the page opposite to the changed portion.
C. A vertical black line should be drawn to make any revision,addition and deletion along the ouside of the page opposite to the changed ciontents.
A. 飞行控制为自动控制飞机飞行姿态特性提供方法,包括液压助力系统、升降舵脚蹬、控制杆连杆、控制钢索、调整片控制、安装支架等。
B. 飞行控制为人工控制飞机飞行姿态特性提供方法,包括液压助力系统、方向舵脚蹬、控制杆连杆、控制钢索、调整片控制、安装支架等。
C. 飞行控制为人工控制飞机飞行姿态特性提供方法,包括气源助力系统、方向舵脚蹬、控制杆连杆、控制钢索、配平片控制、安装支架等。
A. 大量的高压燃油供油用于作动器控制和到燃烧室的计量燃油,其余部分通过溢流活门返回给低压系统
B. 除作动器控制和到燃烧室的计量燃油外,过量的高压燃油供油通过溢流阀返回给低压系统
C. 超量的高压燃油供油用于作动器控制和到燃烧室的计量燃油,之后通过溢流活门返回给低压系统
A. The windshields are filled in a form that requires an exact shape, but they are necessary to have a slightly larger space for the ease of adjustment.
B. The shape of the windshields has exact requirements, but for purpose of exact size, they appear slightly larger.
C. These windshields are shaped to a required exact appearance, but in order to be clipped accurately, they are a little bigger than necessary.
