There is also a wind indicator on the clock tower with a gliding sailing boat model in the middle.
钟楼上还设有风向仪，中间镶有一座鎏金英国帆船模型。
The weakness of usual portable clock model is pointed out and a new model considering the rate between portable clock and standard clock is given.
指出了常用搬运钟法计算模型中存在的不足，给出了考虑搬运钟与标准钟速率差的计算模型。
Carried on a valid estimate to the clock sale quantity in the part excellently turn the model, make sure stock strategy according to the estimate result.
在局部优化模型中对钟表销售量进行了有效的预测，根据预测结果确定库存策略。
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