Setting things still need to filter with the pressure gauge, so as to show the need to change the filter material when.
凝结物过滤器还需要配备压力计，借以指示何时需要更换过滤材料。
The main fuel tank must have all the following: a filler tube, a ventilation system, fuel pickup tube and filter, plus a gauge-sending unit.
油箱必须装备以下元件：加油管、油箱通风系统、吸入管、滤清器和油量传感装置。
Air inlet filter pressure differential gauge, shipped loose.
空气进气过滤器压差表，散件。
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