11. Although the liquid-level indicating system is installed, a _______ is generally installed for the traditional tank level measurement.
(A) liquid sensing tube
(B) air purge tube
(C) sounding tube
(D) capillarity tube

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統計: A(4), B(0), C(2), D(0), E(0) #3922455

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#7400841
答案:(C) sounding tub...
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