Abstract: A method of machining a plurality of circumferentially spaced bores in an object, each of the bores extending generally tangentially and inwardly and being positioned in the object so as to generally asymmetrically intersect two adjacent bores, comprises the steps of: providing an object; determining a plurality of bore positions generally around a circumference of the object; machining a first bore and performing at least one subsequent machining operation on the first bore to substantially complete the first bore; machining a second bore immediately adjacent to the completed first bore, wherein the second bore is machined so as to intersect the completed first bore, and performing at least one subsequent machining operation on the second bore to substantially complete the second bore; sequentially machining a remaining plurality of bores except a final bore, wherein each said bore is machined so as to intersect an immediately adjacent completed bore; and machining the final bore immediately intermediate the

Abstract: A method for supplying and withdrawing water to and from a user apparatus is achieved by supplying and withdrawing water through a single water pipe during different periods of time. A remote controlled water flow and drain system for implementation of this water supply and withdrawal method includes a water passage having two ends, one being use with the user apparatus such as a plant pot, and the other being connected to a reversible pump, and is controlled by a main controller, preferably in combination with a remote controller. The system can be connected to both a water source and a place for drainage, selectively communicating with the water source to supply water through the water passage to the user apparatus at one time, and at another time communicating the place for drainage to withdraw water from the user apparatus and deliver the withdrawn water to the place for drainage.

Abstract: A head part of an annular combustor for a gas turbine includes an annular bulkhead at the upstream end of the combustor. The bulkhead includes a first annular section integrally, inwardly and radially extending from the outer annular wall of the combustor, and a second annular section integrally, outwardly and radially extending from the annular inner wall of the combustor. The first and second annular sections are overlapped adjacent to the annular inner wall and secured together by segmented heat shields which have integrated threaded studs engaging with self-locking nuts, and cover the downstream side of bulkhead. The first annular section has a plurality of apertures circumferentially spaced apart from one another to receive fuel burners. Each burner is radial-displaceably positioned in the aperture and sealed by a burner collar, which is clamped between the heat shield and the bulkhead wall.