A gas-fuelled burner, especially for gas turbines powered by low calorific value fuel, is provided with restrictors to slow the incoming fuel from inlets to a similar mass mean velocity as the air provided through inlets, thereby reducing turbulence and improving combustion. The vertical portion includes an opening at its top end and the opening is configured to receive an elongate portion of a toy. The embodiments of the present invention reduce unnecessary signaling interactions between the Home Subscriber Server and other network elements, enhance the data transmission performance of the network, and reduce the unnecessary overhead of the HSS. The first and second current transformers are respectively connected with first and second sides of the circuit breaker. While other persons can learn the basic gesture or motion, the way in which each person makes that gesture or motion will generally be at least slightly different, which can be used to prevent unauthorized access to sensitive information, protected functionality, or other such content. The driving element drives the distributing valves mechanism, depending on the amount of particles determined to be in the milk, so that milk of diminished quality is selected out.