WELLHEAD ASSEMBLY

申请公布号：GB1557124(A)

申请号：GB19770014717

申请日期：1977.04.07

申请公布日期：1979.12.05

申请人：

COMBUSTION ENG INC

分类号：E21B33/047;E21B34/16;(IPC1-7):E21B33/04

主分类号：E21B33/047

METHOD AND APPARATUS FOR AUTOMATIC ANALYSIS

VISUAL DISPLAY CONTROL UNIT FOR ANALYZER

ELECTROMAGNETIC WAVE SHIELDING CLOTHES CONDUCTIVITY INSPECTING DEVICE AND ITS USING METHOD

FLUORESCENCE X-RAY ANALYZER

FRICTION TEST DEVICE IN ULTRAHIGH VACUUM AND ITS TEST METHOD

APPARATUS FOR DETECTING ATMOSPHERE IN FURNACE

BALANCE

DEVICE AND METHOD FOR GENERATING DISTANCE IMAGE

CIRCUIT SUBSTRATE AND ITS MANUFACTURING METHOD

SYSTEM FOR FORMING ATOMIZED SAMPLE SPECIMEN-CONTAINING SOLUTION TO BE INTRODUCED INTO SAMPLE ANALYZING SYSTEM AND SAMPLE INTRODUCING SYSTEM

METHOD AND DEVICE FOR ANALYZING TRACE IMPURITY IN GAS

CONDUCTIVITY SENSOR FOR WATER QUALITY CONTROL, AND ABSORPTION TYPE COLD AND HOT WATER MACHINE

DEVICE FOR AUTOMATICALLY PREPARING BLOOD SMEAR ON PLATE

METHOD AND APPARATUS FOR MEASURING GROUNDWATER LEVEL

DEVICE AND METHOD FOR MONITORING ABNORMALITY IN PRESSURE AND GAS METER

METHOD FOR MEASURING DIMENSION

COOLING TOWER

OVERLAPPED DRAWN CUP HEAT EXCHANGER

CONDENSER FOR VEHICLE

STRUCTURE OF SETTING RACK OF WARM AIR HEATER