General small-diameter pipe elbow, more than the standard production by the plant site produced without forming elbows.
而一般小口径管道弯头，多由工厂按标准生产成形弯头不用现场制作。
General small-diameter pipe elbow, more than the standard production by the plant site produced without forming elbows.
而一般小口径管道弯头，多由工厂按标准生产成形弯头不用现场制作。
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