而前言与技术内容一般都是用转折语(例如：包含(comprising)或其特征在于(characterized in))做区隔，亦即在从标的到转折语所描述的内容均为前言，于转折语到句点所描述的内容则为技术内容。
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其特征在于分光系统由一个光栏和滤光片组成。
The spectroscope consists of diaphragm and light filter sheet.
它包括伞体，其特征在于，在伞柄上设有双肩背带，伞柄靠下端为扁平状。
The umbrella is characterized in that umbrella stem is provided with two braces and lower end of the umbrella stem is flat.
根据权利要求1所述的金属塑料复合螺帽，其特征在于所述金属嵌件与塑料层整体注塑成型。
The metal-plastic composite nut, according to Claim 1, is characterized in that the injection molding of metal insert and complete plastic layer.
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