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Objective To study the species and infection rate of intermediate host of Paragonimus.
目的了解建瓯市并殖吸虫及媒介宿主的种类与感染情况。
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Intermediate flow rate with higher stress crack resistance than 340.
中高级流量，抗裂应力超过340。
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Intermediate flow rate with higher stress crack resistance than 340.
中高级流量，抗裂应力超过340。
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