THREE:"Fiddlesticks! You are the victim of a vile conspiracy, my dear fellow, if ever there was one. Now let me go on with my visions. The motor is an unusually silent one, and it was painted a dull, lustreless black."Ren Lalage confessed himself puzzled. Compatriots had shown him the paper, but he had forgotten. There was a headpiece to the paper with a woman on it blowing a trumpet. It seemed to be all actors and the like.
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荣誉榜
THREE:
THREE:Cores are employed mainly for what may be termed the displacement of metal in moulds. There is no clear line of distinction between cores and moulds, as founding is now conducted; cores may be of green sand, and made to surround the exterior of a piece, as well as to make perforations or to form recesses within it. The term 'core,' in its technical sense, means dried moulds, as distinguished from green sand. Wheels or other castings are said to be cast in cores when the moulds are made in pieces and dried. Supporting and venting cores, and their expansion, are conditions to which especial attention [95] is called. When a core is surrounded with hot metal, it gives off, because of moisture and the burning of the 'wash,' a large amount of gas which must have free means of escape. In the arrangement of cores, therefore, attention must be had to some means of venting, which is generally attained by allowing them to project through the sides of the mould and communicate with the air outside.
