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簡要描述：

Grad系列中(zhong)壓(ya)(ya)二元梯(ti)(ti)度泵(beng)(beng)由兩個(ge)高性能的可單獨工作的泵(beng)(beng)組成(cheng)， 任一泵(beng)(beng)均可獨立操控(kong)，避(bi)免了低壓(ya)(ya)梯(ti)(ti)度系統(tong)(tong)中(zhong)泵(beng)(beng)一旦(dan)出(chu)現(xian)故障(zhang)則系統(tong)(tong)*癱(tan)瘓的缺(que)點， 中(zhong)壓(ya)(ya)梯(ti)(ti)度形(xing)成(cheng)于泵(beng)(beng)出(chu)口，大大降低了低壓(ya)(ya)梯(ti)(ti)度形(xing)式(shi)下的混(hun)合(he)(he)死體(ti)積，使梯(ti)(ti)度更易于控(kong)制，中(zhong)壓(ya)(ya)梯(ti)(ti)度混(hun)合(he)(he)方(fang)式(shi)消除了低壓(ya)(ya)梯(ti)(ti)度混(hun)合(he)(he)經常出(chu)現(xian)的氣泡問題，重現(xian)性好(hao)。