They have a precision ground finish on both sides to prevent packing and seat damage.
闸板两侧经过精密的精磨加工工艺，能够防止密封填料和阀座的损坏。
They feature a precision ground finish on both sides to prevent packing and seat damage.
闸板两面均经过精密精磨加工，避免损坏填料和阀座。
They feature a precision ground finish on both sides to prevent packing and seat damage.
闸板两面均经过精密精磨加工，避免损坏填料和阀座。
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