资源类型

时间范围

首页 > 检索结果 >

Fan glider for cleaning roof fan, has dust collector arranged on stick and adapted to expand radially for collecting dust, claw arranged at distal end on stick and adapted to receive blade of fan, and claw comprising cleaning pad for cleaning fan 2024-04-29
System for fabricating adjustable drum seeder for sowing seeds by farmers in dry soil, has cylindrical drum optimized with specific diameter and formed with six seed metering holes, where diameter of each seed metering hole is about specific range 2023-01-21