Because I-P units are widely used in the HVAC&R industry in the U.S., I-P units are used in thischapter. A table for converting I-P units to SI units is available in Appendix X of this handbook.
chapter. A table for converting I-P units to SI units is available in Appendix X of this handbook.
这几句话中的缩写i-p是什么意思？
跪求赐教！！！！！！！！！！！！！
