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藍丹畫線液: 本畫線液專門為鉗工；機工及各種專業工程師在設計高精度和高品質機械部件過程中使用而配製。 QQ-92 blue Dan draw a line the fluid: This linedraw fluid is a fitter specially; The mechanic and each kind of specialized engineer use in the design high accuracy and in the high quality mechanical part process compound.
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