ZY32001535型掩护式支架-论文同学网 关键词：液压支架；顶梁；底座；立柱；结构设计 [gap=1384]Keyword: Hydraulic pressure support；Top beam；Cradle；the column-type support；structure design
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The ALTER COLUMN SET DATA type option on the ALTER TABLE statement has been extended to support all compatible types.
ALTER table语句中的ALTER COLUMN SET DATA TYPE选项进行了扩展，可以支持所有兼容的类型。
While Oracle 9i does support the timestamp column type, timestamp resolution is less exact than with other database systems.
而Oracle 9i会支持timestamp列类型，时间戳的精确度会不如其它的数据库系统准确。
One kind of beam type gas injection packing support plate used in the column is introduced. The curve equation of the developed pattern of the arciform plate is presented.
介绍了塔器内梁型气体喷射式填料支承及其拱形板展开图，并通过详细计算给出了该展开图的曲线方程。
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