M30B 3.7CC Mini Retro Vertical Double-cylinder Reciprocating Double-acting Steam Engine Model Toys

3.7CC Mini Retro Vertical Double-cylinder Reciprocating Double-acting Steam Engine Model ToysFeatures:.The exquisite and compact steam model is easy to install and play with in your hands, making you hardly tear yourself away from it..Mainly made of brass and processed by CNC machining, the premium quality model boasts rich-in-luster, delicate and aesthetic surface for fine production, sophisticated technology and smooth operation. The main shaft sleeve adopts abrasion-resistant beryllium brass with high hardness to ensure long-term running. .Easy to operate without fussiness, the installed steam engine with boiler allows the users to intuitively feel the charm of the steam engine..Suitable for steam engine enthusiasts, the engine model with considerable operability is able to exercise hands-on ability and teach children or students about the operation of steam engines..Walk through the working principle of the steam model more intuitively through operating it, which boasts an extremel