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Waterway level post is slotted at all ten values for easier reading in failing light or when fouled and is especially suitable at inaccessible sites.
Waterway level post is slotted at all ten values for easier reading in failing light or when fouled and is especially suitable at inaccessible sites.
The vertical level post (LP) is slotted out at the ten values (13-19) for easier reading e.g. at dusk or dawn, taking slots to show the level in failing light and so report on changing water levels.
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