valve with spring core
美
[vælv wɪð sprɪŋ kɔr]
英
[vælv wið spriŋ kɔ:]
弹簧心阀
Examples
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美[vælv wɪð sprɪŋ kɔr]英[vælv wið spriŋ kɔ:]
弹簧心阀