What is the role of the needles in the dispensing valve

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What kind of needles can be used for a thimble pin valve

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Do the needles are in the form of spray?

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Where to buy a needle for a long needle in Dongguan

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What are the medical uses of the lengthened needles?

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How can a long needle be purchased?

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How to locate the needle of the glue dispenser?

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The pin diameter of that kind of glue is most suitable for p

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