FISHING FLEET PROGRAMMING MODEL Analysis for Cost of Production of Oceangoing Jigger Fleet 渔船编队规划模型远洋鱿鱼钓船营运成本分析
The Storage Model about Production and Sale under the Condition of Limited Space Storehouse Considering with Marginal Cost 仓库容量有限条件下考虑边际成本时的生产销售存贮研究
The compounding machine pressure gas curtain barricade of the utility model has high service life and low production cost. 本实用新型的复合机压气幕挡墙使用寿命高, 而且生产本低。