简单机械实验盒能组成杠杆、轮轴、滑轮、斜面四种简单机械装置和齿轮、皮带、连杆三种传动机构，还可组成一台起重机模型，供小学学生分组实验用。
J215 Experimental Simple Machine
It can be assembled into 4 simole mechanical devices: lever; shaft; pulley; bevel face, or 3 rotatory mechanism; gear; belt; rod. The primary school pupils in groupmay carry out an experiment with these machine parts to assemble a crane.