变量施肥机具的设计
Design of Variable Rate Fertilizer Applicator
冲制平衡块模具的改进
Improvement on Die for Punched Counter Balance
厨房热用具的改进研究
Study on improvement of the kitchenwares
灯具的几何可见度角
angles of geometric visibility of a lamp
灯具的选用和布置
selection and layout of lamp
电炊具的节电窍门
Method of energy saving in electric kitchenwares
防误闭锁锁具的应用
Application of Mis-closedown Lock
附加机具的主控制阀
optional implement main control valve
古典家具的保护
Classic furniture’s conservation