1: The focusing structure is not limited by distance 2: dustproof and waterproof, can be used in harsh environment 3: Stable and reliable, can work for a long time

1: The use of double glass bonding has good high temperature resistance 2: specific high stability and good high temperature resistance

1: The use of double glass bonding has good high temperature resistance 2: specific high stability and good high temperature resistance

1: Excellent transmittance 2: The cut-off depth is up to OD6

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