Finite element analysis for constraint model was conducted on the gear box casing of 7ypj agricultural tricar using modal analytic theory according to its structural characteristics.
针对7ypj型农用三轮汽车齿轮箱体的结构特点，应用模态分析理论对其进行了约束模态的有限元分析。
Please put each bottle in a foam plastic casing and then in a thick paper box.
译文：请将每个瓶子加一个塑料泡沫套并装在后纸盒内。
YHX series threading box the necessary connecting piece at the junction of the casing, cable connector and branch when laying the cable.
YHX系列穿线盒是电缆穿管敷设时在套管连接处、电缆接头处、分支处必须采用的连接件。
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