液化天然气lng市场调研及发展趋势预测精选

液化天然气lng市场调研及发展趋势预测精选

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时间:2019-02-24

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2、olwater(a)plans,andtheirimplementation.A,yearb,quartersc,3,coalmines,mineshouldbe(a)forwatereducationandtrainingtoensureemployeeshavethenecessaryknowledgeofwatercontrol,improvingwatercontrolworkskillsandtheabilitytoresistwaterdamage.A,b,c,grass-rootsleaders,leadersofworkersd,headofminemainwell4,

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4、pHousefloor7m.A,1b,2c,3d,46miningareawaterChamber,theeffectivecapacityshouldbeabletohold(b)normalinflowinminingarea.A,2Hb,4Hc,6hd,8h7,shortsumpcapacityshouldbemaintainedatatotalcapacityof(b)above.A,40%b,50%c,60%d,70%8,intheyearbeforetherainyseason,shouldcompleteoverhaul(a),andallpumpsandbackuppu

5、mpswere1jointtestsandfoundtheproblemanddealwithit.A,1b,2c,3d,4-9,complexandverycomplexhydrogeologicalconditionsofmineonthegroundcouldnotbeidentifiedwhenminehydrogeologicalconditionandwaterfillingfactorsshouldbepersisted,(d)theprincipleofstrengtheningtheworkofsurveywater.A,diggingafterthefirstb,c

6、mining,afterthefirsthadthesuspectswillfindd,excavationswillbe10,penetratingexplorationofgoafwater,karsticwateranddrillingwater,waterdrillinggrouplayout,andintheroadwayinfrontofthehorizontalplaneandverticalplanefan-shaped.Drillholelocationstomeethorizontaldistance(d)asthestandard,thickcoalseamint

7、heboreholeoffsetmustnotexceed1.5M.A,1Mb,1.5Mc,2md,3M11,seam,prohibitioninprinciplesurveywaterpressureabove(c)MPawaterfillingfaultwater,aquiferwaterandkarsticwater.Ifneeded,youcanwaterproofwallandgatewallwithinsurveywater.A,b

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