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鋼管外徑檢測(cè) |
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點(diǎn)評(píng)
沒(méi)看見(jiàn)“惰輥”嗎?
請(qǐng)問(wèn)一下直徑2米,長(zhǎng)12米,還在移動(dòng)的輥?zhàn)由?。閣下如何確保光柵尺恰恰就在直徑位置上,而沒(méi)有偏移?
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