Serious analysis of the advance action of front cots,conseque nce thereof and way of location,It is pointed out that the advance value should be smaller than that given in the specification.

• 紧密围绕前胶辊前冲的前因、后果和确定原则及定位方法进行了分析，指出前冲量的取值应偏小于摇架使用说明书的要求范围。