申请人 |
SCHLUMBERGER INDUSTRIES LTD., FARNBOROUGH, HAMPSHIRE, GB |
发明人 |
GOLIGHTLY, DEREK, FELIXSTOWE, SUFFOLK IP11 7LD, GB;PATTINSON, NEVILLE GRAHAM, IPSWICH, SUFFOLK IP10 0TJ, GB;CLARKE, DAVID JOHN, BRAMFORD, SUFFOLK IP8 4HA, GB;VAUGHAN, JOHN EDWARD, FELIXSTOWE, SUFFOLK IP11 7EQ, GB |