The phrase "and techniques which are" is correct and usable in written English.
It can be used when discussing methods or approaches that are relevant to a particular subject or field.
Example: "The study focuses on various strategies and techniques which are essential for effective communication in the workplace."
Alternatives: "and methods that are" or "and approaches that are".
The demands of floating give permission to use exotic materials and techniques which are superfluous on land.
Industry is looking for materials and techniques which are more productive as well as environment friendly.
With his brother Jerry, he developed some of the earliest state of the art surgical instruments and techniques which are still in use today.
Or invested vast amounts of time and money in drawing up new curricula, painstakingly detailing specific skills and techniques which are superseded almost immediately.
We provide an approach and techniques which are totally different from previous approaches and techniques for the problem.
This subject is a survey of the fundamental analytic tools, approaches, and techniques which are useful in the design and operation of logistics systems and integrated supply chains.
My laboratory colleagues were always helpful and patient with me as I learned new methods and techniques, which is very important to a young scientist.
(With Chaplin, there's a unity between source and technique — which isn't necessarily preferable).
It is a solid base for everything in a dance career and enhances a dancer's line and technique, which is essential to Rockette work".
The mechanical behaviors of concrete under multi-axial stress state have to be tested and measured by using the special equipment and technique, which is briefly introduced.
A key motivation for developing landmark point techniques is that they lay the foundation for developing 3D models and associated dynamic feature extraction and recognition techniques which are highly likely superior to 2D-based and static 3D-based techniques.
