1/2 NPT class 3000 forged steel threaded coupling是什么意思1-1/2 NPT class 3000 forged steel threaded coupling呢?

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1/2 NPT class 3000 forged steel threaded coupling是什么意思1-1/2 NPT class 3000 forged steel threaded coupling呢?

1/2 NPT class 3000 forged steel threaded coupling是什么意思1-1/2 NPT class 3000 forged steel threaded coupling呢?
1/2 NPT class 3000 forged steel threaded coupling是什么意思
1-1/2 NPT class 3000 forged steel threaded coupling呢?

1/2 NPT class 3000 forged steel threaded coupling是什么意思1-1/2 NPT class 3000 forged steel threaded coupling呢?
NPT是英标.是螺纹的标准!