订购时，请指明链轮型号，链条型号和长度，或美国尼伯科阀门的型号、尺寸和链条长度。
When ordering, specify the sprocket number, chain number and length, or the NIBCO valve figure number, size and the chain length.
订购时，请指明链轮型号，链条型号和长度，或美国尼伯科阀门的型号、尺寸和链条长度。
When ordering specify either the sprocket and chain number or the NIBCO valve figure number and size.
订购时，既要指明链轮型号，也要指明链条型号，或者美国尼伯科公司阀门的型号和尺寸。链条的长度也要指明。
When ordering specify either the sprocket and chain numBEr or the NIBCO valve figure numBEr and size. The chain length must also BE specified.
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