CL-Ⅱ型立式罐大容量标准测量仪(水准·铅直仪)
CL-Ⅱ형입식관대용량표준측량의(수준·연직의)
The Model CL- Ⅱ Standard Instrument for The Volume Measurement of Vertical Metal Tank (Level ·Collimator)
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