Welcometoourconstructionsite.
Gladtohaveyouhere.
Ourjobsiteisoverthere/here.
Itisverysimpleandcrudehere.Donotmind,please.
Comein,please.Bequick.Justaminute,please.Takecare.
Iamasiteengineer(director,workshophead,chiefofsection,foreman,worker,staffmember).
MayIintroduceourchiefengineertoyou.
Mr.Wangisresponsibleforthistask.
Iaminchargeofthissection.
Loaders,forkliftsandaircompressorsareheavyconstructionmachinery.
Wemuststudytheinstructionbeforeoperationthepipebender(handpump,hydraulictestingpump).
Thethicknessofthesteelplatehandledbythisrollermill(shearmachine)is25millimeters.
Thislathe(milling,boring,grinding,drilling,gearcutting,planer)machineisofhomemanufacture.
Allmachinerymustbelubricatedperiodicallyaccordingtothelubricationchart.
Tomaintainitsefficiency,themachineryneedsaregularservice(check-over,repairing,overhaul).
Tellmeabouttheoperationofthemachine.
Bearingsmustbelubricatedperiodically.
Needwemakeanyadjustmentofthismachine?
Thevise(parallel-jawvice)isavailabletoallofthebenchwork.
Greasegunandoilerarethelubricationservicetoolsformachinery.
Torquewrenchesoffertheprecisionmeasurementneededtotightenfasteners.
Themeasuringunitoftorquewrenchispound-inchorkilogram-centimeter.
Isthemachineaccompaniedwithsometools(spareparts,accessories)?
Shallweuseaspecialtoolforthisjob?
Couldyoutellushowtouse(operate,repair,maintain,clean,adjust)thisnewtool?
Thetoolgetsoutoforder,wemustremedyitstrouble.
Thetoolisoutofrepair,itneedsanoverhaul.
Wehaveallkindsofconstructionmachineryonthejobsite.
Thetruckcrane(gantrycrane,towercrane,mobileslewingcrane,bridgecrane,crawlercrane)canliftaweightof15tons.
Thehoistingcapacityofthatginpole(girderpole,guyderrick)issixtytons.
Thisisamotorhoist(winch)withlow(high)wrappingspeed.
Whatisthehorsepower(H.P)ofthisengine(tractor,excavator,bulldozer,motorscraper,roller)?
Weusedtoweldpipeswithdirectcurrent(D.C)arewelder(alternatingcurrentA.C.welder).
Theconcretemixer(concretetruckmixer,concretevibrator,concretebatchplant)madebyHua-DongWorksaresteadyinqualityandreliableinperformance.
Therearefourbroadclassificationsofsteel:carbonsteels,alloysteels,high-strengthlow-alloysteelsandstainlesssteels.
Copper,zinc,lead,aluminium,bronzeandbrassarenonferrousmetalsoralloys.
Thisalloyismainlycomposedofelementchromiumandnickel(titanium,vanadium,manganese).
Thestandards“GB”and“YB”providethemethodoftestingformaterialsinourcountryjustlikethestandardASTMinAmerica.
Wehaveasbestos(rubber,plastic,glass,paint)productsofallkinds.
Bolt(screw,nut,stud,springwasher,pin,ballbearing,rollerbearing)isthemostcommonlyusedmachinepart.
Castironcannotcomparewithsteelintensilestrength.
Wecanperformthepipebyfollowingoperations:cuttingandmechanicalchamfering,manualandautomaticwelding.
Thecomputergeneratesisometricdrawingsandprintsoutbillofmaterials.
Weshallcompletethemanhourrequirementsforthesitefabrication(siteerection)ofthisdrawing.
Seamlesssteeltubeismadeinsizesfor1/8to24inches.
Spiral-weldedsteelpipeisavailableinsizesfrom6to36inches.
Twotypesofendarestandardonsteelpipesandfittings,thatisflangedandscrewed.
hispipeismadeofcarbonsteel(stainlesssteel,castiron,plastic).
Weusuallyuseelbow(bend,flange,tee,reducer)asakindofpipefitting.