Gōng / zuò / rén / yuán / yòng / hóng / xī / de / fāng / fǎ / bǎ / shuǐ / xiāng / lǐ / de / shuǐ / pái / chū / qù工作人员用虹吸的方法把水箱里的水排出去。The staff used a siphon to drain the water from the tank.