简述YL22断条器气缸气压的调整方法和要求?
1、断条装置所用的压缩空气压力不低于0.4MPa。
2、调节两只节流阀来实现剪切刀座来回行程的速度,使打开或关闭保护顶盖后 , 整个剪切有一个柔和的摆动过程。
(1) 向左旋转剪切头返回增快;(2) 向右旋转剪切头返回减慢。
暂无解析
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Inthepast,operationsweredifficult.Untilthemiddleoftheeighteenfifties,surgerywasverydangerous.Manypatientsdiedaftereventhesmallestoperations.Thiswasbecausebacteriaenteredthecutsinthepatientsbodied’andstartedinfection.Insomecountries,upto90percentofpatientsdiedfrominfectionafteroperations.In1865,however,JosephLister,aBritishsurgeon,foundananswertotheproblem.Heusedan“antisepticduring”andafteroperations.Thiskilledthedangerousbacteriaandmostofhispatientslived.Sincethen,surgeonshaveusedantisepticsinalloperations.SurgeryhasdevelopedinmanyimportantwayssincethedayofJosephLister.Today,whenpatientsgotohospitalforanoperation,theycanexpectthebesttreatment,incleanandhygienicconditions.
33.Operationsweredifficultanddangerousuntil_______.
A.1850
B.themiddleof1850
C.themiddleofthefiftiesoftheeighteenthcentury
D.themiddleofthefiftiesofthenineteenthcentury
34.Inthepassage,surgerymeans__________.
A.Theperformingofanoperation
B.cure
C.treatment
D.medicine
35.Inthepast,upto90percentofpatientsdiedafteroperationsmainlyb
ecause__________.
A.bacteriaenteredthecutsinthepatientsbodies’andinfectiontookplace
B.theconditionsinhospitalswerebad
C.theskillofsurgeonswasnotsogood
D.therewerenogoodmedicineatthattime
36.Whichtopicofthefollowingbestsuitsthepassage?
A.Operationsweredifficultinthepast
B.ThedevotionofJosephListertomedicalscience
C.Surgeryhasbecomesafer
D.Developmentsinsurgery
37.JosephListerwas________.
A.aFrenchman
B.aGerman
C.anEnglishman
D.anAmeric
某桥基础为6根2.0m的桩基,桩长35m,桩顶设置承台。地质条件如下:原地面往下依次为2m的覆盖层和含15%砂砾石的土,施工水位比桩顶高1.5m,施工单位拟选用正循环回转转机,钢护筒结构,采用导管法灌注水下混凝寸。
问题:
1、在成孔过程中应注意哪些方面?
2、在清孔过程中应注意哪些方面?
3、如何进行水下混凝土的浇筑?
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