以分析起重机油箱上体工艺特性和设计其低熔点合金拉深模具结构为例，论述了低熔点合金冲压模具的结构特点及优势。
Though the analyzing of the upper part of oil box and the designing of the structure of the die, the article discusses the characters and advantage of the low melting point alloy die.
就是因为其在皮带上使用了机油后短时间内可以运转，过后因大量灰尘聚集，日积月累最终皮带损坏。
Because of the short time use of oil on the belt after the operation, after due to excessive dust accumulation, final days and months multiplying belt damage.
介绍了YZ90机油冷却器的组成，阐述了其工作原理。
Component parts and work principle of YZ90 type engine oil cooler are introduced.
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