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Question:

Is the warning plate reflective material?

Is the manhole warning plate reflective material? 70cm check how high the manhole marks can be used

Answer:

70cm check how high inspection well can be used on the wellhead. The warning mark (check rod and warning bar) is usually used in 60cm inspection well
The principle of reflecting the glass beads used in high strength reflective films is the latest technology reflected in the micro cube.
The inspection wells warning signs (antifalling reflective warning signs manhole reflective film using reflection principle) is different from the engineering level

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