Sentence examples for has been developed before from inspiring English sources
"Our slippery steel is orders of magnitude more durable than any anti-fouling material that has been developed before," said Aizenberg.
As far as we know, no walk algorithm specialized on pseudo-triangulations has been developed before.
Design, calculations and testing of the axles has been developed before long time and basic procedures are anchored in the European standards EN.
As there is a huge gap between the kinetic energies of ions in the magnetic sector and that in the quadrupole mass spectrometers, no sector-quadrupole type tandem mass spectrometer has been developed before.
The latter can be performed uneventfully if a good collateral network has been developed before IVC occlusion or if it has not affected segment III IVC as it happened in our patient [3,7-9].
No such empirically based online tool has been developed before.
Other gene therapies have been developed before, but those therapies modified more mature cells that cannot reproduce themselves.
Similar attempts to promote muscle stimulation have been developed before, but have been too bulky to implant.
We believe the government should have waited to see whether a business case could have been developed before making this announcement".
The policy, Mr. Nelson said, had been developed "before text messaging protections such as spam filters adequately protected customers from unwanted messages".
