含有己烷蒸汽的氮气,经旋风分离器S2201A至洗涤塔T2201,在洗塔T2201中干燥后循环回流化床DR2201。
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由于PDH是采用异步复用的方式,所以不能从高速信号中直接分/插出低速信号,而必须逐级进行。
A. 正确
B. 错误
If two fuel service tanks are installed, the empty tank should be pumped up directly it is emptyWhat is the meaning of “directly” in the sentence above?()
A. at once
B. as soon as
C. quickly
D. straight
采用单一来源方式,需要继续从原供应商处添购的,添购资金总额不超过原合同采购金额的20%。
A. 正确
B. 错误