NL161839C
(en )
1980-03-17
COUPLING FOR METAL PIPES, PARTICULARLY FOR THE PETROLEUM INDUSTRY.
NL152628B
(en )
1977-03-15
THREADED PIPE CONNECTION, ESPECIALLY FOR PIPES FOR DEEP BORE.
NL7708188A
(en )
1978-01-25
PIPE COUPLINGS, PARTICULARLY FOR PETROLEUM PIPES.
NL7510597A
(en )
1976-03-16
PIPE SPACER, ESPECIALLY FOR A WELL.
NL160071C
(en )
1979-09-17
NIPPLE COUPLING FOR A HIGH PRESSURE FLUIDUM SYSTEM.
NL7408279A
(en )
1975-02-24
TWO-DIRECTIONAL VALVE FOR HIGH PRESSURE FLUID PIPES.
NL183230C
(en )
1988-09-01
METHOD FOR MANUFACTURING A PTFE PIPE
NL167338C
(en )
1981-12-16
SHIFT VALVE FOR CONNECTING A PIPELINE WITH A FIRST MEDIUM PIPE AND A SECOND MEDIUM PIPE.
NL166963C
(en )
1981-10-15
METHOD FOR PREPARING FOAMED POLYALKENE AND ARTICLES MANUFACTURED USING THE POLYALOKE PREPARED SO
NL7601626A
(en )
1976-08-26
PIPE FOR TRANSPORTING A FLUID, WHOSE TEMPERATURE DIFFERS FROM THE ENVIRONMENT.
NL153656B
(en )
1977-06-15
PROCESS OF MANUFACTURING A HEAT-INSULATING COVERING FOR A PIPE AND THE COATING SO MANUFACTURED.
NL152956B
(en )
1977-04-15
THREADED TUBE CONNECTION, ESPECIALLY FOR A BOREBOLE CONNECTION.
NL156225B
(en )
1978-03-15
VALVE, ESPECIALLY BREATH VALVE FOR A LIQUID PIPING SYSTEM.
NL7505076A
(en )
1975-10-31
METHOD AND DEVICE FOR THE MANUFACTURE OF PIPES WITH A SCREW-LINE-SHAPED SEAM, AND PIPES MANUFACTURED IN THIS WAY.
NL148364B
(en )
1976-01-15
PROCEDURE FOR MANUFACTURING A DRAWING CLOSURE, AS WELL AS A DRAWING CLOSURE MADE UNDER THE APPLICATION OF THIS PROCESS.
NL7511229A
(en )
1976-04-06
GASKET, ESPECIALLY FOR SEWER PIPE CONNECTIONS.
NL168054B
(en )
1981-09-16
METHOD FOR MANUFACTURING RELIEF FORMS, AND A FIXED, PHOTOPOLYMERISABLE ELEMENT, MANUFACTURED USING THIS METHOD
NL158906B
(en )
1978-12-15
DEVICE FOR CHECKING THE BENDING LINE OF A PIPE PIPE.
NL155212B
(en )
1977-12-15
PROCEDURE FOR THE CONTINUOUS MANUFACTURE OF A HEAT-INSULATING PIPE AND THE PIPE SO MANUFACTURED.
NL169107B
(en )
1982-01-04
DEVICE FOR DETECTING LEAKS IN A PIPELINE.
NL170455C
(en )
1982-11-01
ROTATABLE COUPLING FOR A LIQUID TRANSPORT PIPE.
NL148921B
(en )
1976-03-15
PROCESS FOR PREPARING A COATING AGENT FOR ELECTROPHOSIS.
NL158909B
(en )
1978-12-15
QUICK COUPLER FOR A SMOOTH PIPE.
NL7509979A
(en )
1977-02-24
HIGH-PRESSURE LIQUIDS PIPING SYSTEM, EQUIPPED WITH A SHUT-OFF ELEMENT.
NL174232C
(en )
1984-05-16
METHOD FOR MANUFACTURING A HEAT AND SOUND INSULATED PIPE