Electric double-shaft clearance adjustment device, pneumatic upper cover lifting device.
电动双轴间隙调节装置，气动上盖提升装。
2
The utility model relates to a double-shaft sheet roll and a printing device which is provided with the sheet roll.
本实用新型涉及一种双轴式纸卷及装设此纸卷的打印装置。
3
Unbalanced two-stage reciprocating inertia force can be balanced by using Lanchester's double-shaft balance system, so that the engine noise and vibration could be reduced notably.