Double Cylinder Version Articulated Engine Keychain-2cylinder

是下面这个模型的双缸版本 This is the 2 cylinders version of the following model:https://makerworld.com/zh/models/673705#profileId-601698使用前先把辅助打印的部分去掉（图片只是示意）。Remove the auxiliary printing part before use（The image is only for illustration purposes）. 有两个版本，一个是带孔的，可以作钥匙扣，另一个没有带孔，请按需要打印。There are two versions, one with holes that can be used as a keychain, and the other without holes, please print as needed.需要注意，PETG 和 PLA 并非兼容材料，它们之间的层间粘合性很差。如果将它们一起使用，两种材料之间的结合区域很容易断裂。所以如果要做多色，请不要将PETG 和 PLA 混用。It should be noted that PETG and PLA are not compatible materials, and the interlayer adhesion between them is poor. If they are used together, the bonding area between the two materials is easily broken. So if you want to do multi-color, please do not use PETG and PLA at the same time.