Pump installation height, length should guarantee the pump working shall not exceed the permitted on vacuum suction height.
泵的安装高度，长度应保证泵工作时不超过允许的吸上真空高度。
Pump installation height, length should guarantee the pump working shall not exceed the permitted on vacuum suction height.
泵的安装高度，长度应保证泵工作时不超过允许的吸上真空高度。
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