Abstract: A food packaging container having a flanged container body of a laminate sheet which comprises a layer of aluminum foil and at leasat one thermoplastic resin layer joined to one surface of the foil layer. The container body is prepared by deep-drawing the laminate sheet with the resin layer inside. The aluminum foil is 40-200 .mu.m in thickness, 9.0-25.0 kgf/mm.sup.2 in tensile strength, 2.5-9.5 kgf/mm.sup.2 in proof stress, 10 to 40% in elongation and up to 7% in earing ratio. The resin layer comprises a thermoplastic resin 100-500 .mu.m in thicknes, 0.92-1.08 in the ratio of modulus of elasticity in tension in the machine directon (MD) to that in the transverse direction (TD), 0.60-1.40 in the MD/TD ratio of elongation and 0.40-1.60 in the MD/TD ratio of breaking strength.

Abstract: An automatic load-matching circuit for microwaves, disposed on a transmission line between a signal source and a load. Signal detection means for detecting a travelling wave component and a reflected wave component and for producing outputs corresponding to the absolute value of reflection coefficient .GAMMA., the cosine products .vertline..GAMMA..vertline. cos .theta., and the sine product .vertline..GAMMA..vertline. sin .theta. for controlling an automatic matching means, which includes three matching elements, each having an adjustable short-circuit length, disposed on the transmission line with a separation of odd number multiples of 1/8 of a wavelength along the transmission line. The first and third matching elements are connected such that in response to a change in the short-circulating length of one of the first and third matching elements, the short-circuiting length of the other of the first and third matching elements changes in a corresponding opposite manner.