首页
产品
黄页
商标
征信
会员服务
注册
登录
全部
|
企业名
|
法人/股东/高管
|
品牌/产品
|
地址
|
经营范围
发明名称
Pressure modulation valve assembly
摘要
申请公布号
GB9818238(D0)
申请公布日期
1998.10.14
申请号
GB19980018238
申请日期
1998.08.20
申请人
BAKER HUGHES INCORPORATED
发明人
分类号
E21B4/00;E21B4/18;E21B21/08;E21B21/10;E21B44/00
主分类号
E21B4/00
代理机构
代理人
主权项
地址
您可能感兴趣的专利
DISTANCE MEASUREMENT DEVICE
FLATNESS MEASUREMENT DEVICE
EVAPORATION COOLING DEVICE
ECHELLE SPECTROSCOPE
INSPECTION METHOD OF PERIODIC OPENING PATTERN AND DEVICE THEREFOR
TRANSFER UNIT AND TRANSFERRING APPARATUS FOR LIQUID
PIPE CONNECTING METAL FITTING FOR THROUGH HOLE
GAS TABLE COOKER
MOLTEN SLAG TREATMENT APPARATUS
INCINERATION METHOD AND APPARATUS FOR WASTE
OUTWARD FLAME HOLE RING BURNER
COUPLING INSTALLING DEVICE FOR PIPE
PIPELINE BANS WITH BOLT
VALVE UNIT AND CIRCULATION WARM BATH UNIT
GATE VALVE DEVICE
VALVE STRUCTURE
LABYRINTH SEAL
METHOD OF SUPPRESSING CREATION OF CHLORINATED MATTER IN WASTE INCINERATION PROCESS
ROTATION PREVENTING JIG FOR ASEISMATIC SADDLE SNAP TAP
MAGNETIC SCREW AND STAGE DEVICE USING THE MAGNETIC SCREW
