Description: Optical level with BT160 tripod and the GR 500 levelling rod. Ideal for outdoor use with robust housing and IP54 dust and splash protection and a working range of up to 60m. 20x ...

The lower box is one the earliest spacecraft ion thrusters (from EOS circa 1962), and on top is a new arrival, a modern ...

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Description: Single-line wavelengths include 458, 488, or 514 nm with output power ranging from 5 to 75 mW and multi-line output power of up to 40 mW. Symmetric design and axial airflow in the ...