Primary School Science
● Including black box, frosted glass, round hole plate with different diameter, ...
Composed of base, wiring terminal, knife, knife holder, handle. Size: 75*35*10mm...
The test rod includes wooden rod, glass rod, metal rod, plastic rod, ceramic rod...
● Composed of solar panels, small motor with wind leaves, buzzer, LED lights,...
The pressure spring is made from 1.5mm diameter carbon spring steel wire. Length...
The pressure spring is made from 1.5mm diameter carbon spring steel wire with...
● It consists of inclined surface(200*120*13mm) and horizontal surface(500*120*1...
● Composed of stainless steel outer barrel, plastic float, blowing pipe, nozzle,...
Double metal sheet structure with needle; diameter≥100mm, meassuring range: 0%RH...
● The battery case consists of box, spring and connectors, which is used for...