As before, the laser package is hermetically sealed for reliable operation in adverse environments and the laser output is collimated using an internal lens system.
密封激光包在恶劣环境下可靠运行，激光输出采用内部透镜系统校准。
The end surface of spiral channel is sealed by welding, therefore the sealing performance is good with reliable structure.
螺旋通道的端面是焊接密封的，密封性能好，结构可靠。
If an axial load rated bearing is the best, why are they less reliable than the sealed cartridge bearing?
如果额定轴向载荷轴承是最好的，他们为什么不可靠的轴承密封墨盒比？
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