Ear trumpets

The polymer industry traces its beginning to the early modifications of shellac, natural rubber (NR — an amorphous c -l,4-polyisoprene), gutta-percha (GP — a semi-crystalline trfl i-l,4-polyisoprene), and cellulose. In 1846, Parkes patented the first polymer blend NR with GP partially co-dissolved in CSj. Blending these two isomers resulted in partially crosslinked (co-vulcanized) materials whose rigidity was controllable by composition. The blends had many apphcations ranging from picture frames, table-ware, ear-trumpets, to sheathing the first submarine cables. 

The first hearing aids, popularized in the sixteenth century, were lai e ear trumpets. In the nineteenth century, small trumpets or ear cups were placed in acoustic headhands that could he concealed in hats and hairstyles. Small ear trumpets were also built into parasols, fans, and walking sticks. 

If only need to replace the outer components of front drive shaft assembly on car, it ean remove the left and right steering knuekle of ear, then disconnect the inner trumpet connector of front drive shaft assembly, then take out the three-pin seetion assembly and shaft from the inner trumpet connector for replacement. 

Sometimes such a strumpet of a trumpet is to be met with in an orchestra, and when it emits a blast, it seems as though the sound is vibrating not in the orchestra but right in your ear. Such was the sound that broke the quiet of the sleeping house, and it was inunediately followed by a whiff of fragrant eau-de-Cologne, which was invisibly wafted on its way by a deft wave of the cambric handkerchief. 

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