名词
中文翻译：三柱式往复泵
同义词：
['triple reciprocating pump', 'triplex reciprocating pump']
例句：
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1. The triplex reciprocating pump is used in the oil extraction process.
三柱式往复泵用于石油开采过程中。
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2. The engineers designed a triplex reciprocating pump to improve efficiency.
工程师们设计了一个三柱式往复泵来提高效率。
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3. The triplex reciprocating pump was tested under various conditions to ensure its reliability.
对三柱式往复泵进行了各种条件下的测试，以确保其可靠性。