1. The Plaintiff (Counterclaim Defendant) paid KRW 165,067,200 to the Defendant (Counterclaim Plaintiff) and its related amount from April 27, 2017 to March 8, 2018.

1. Basic facts

A. The Plaintiff (former: C) is a company established for the purpose of the manufacture of energy-saving machinery and the installation and construction business, etc., and the Defendant is a company established for the purpose of the construction business of machinery and equipment, etc., and D religious organization E company (hereinafter “E company”) is a temple located in F at the time of public offering.

B. On February 27, 2014, the Defendant concluded a contract with E company and the Defendant to manufacture a set pumps, which are energy-saving equipment, and to install them in E company (hereinafter “instant contract for manufacture and installation”).

C. On April 24, 2014, the Defendant entered into a contract with the Plaintiff (including the value-added tax) on the contract amount of KRW 90,22 million (hereinafter “instant contract”). D.

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The air heat pumps shall use the air heat in the form of air, such as ventilation heat generated in the subway stations, or air heat generated in the subway stations, and the heat pumps shall use the waste heat in the form of water, such as the heat generated in the natural environment, which can be acquired in the form of water such as groundwater and water from a bath, or the water heat generated in the bath.

3 The t pumps are the structure in which it is circulator, compressor, sprinkor, soft valves, expansion valves, and softs, and the principles are as follows:

The heat shall be absorption in the process of converting the heat from the heat source of the low temperature to the gaseous coolant of the low pressure.

It is made high temperature by compressing gaseous coolings into high voltages after being inhaled with compresseds.

It is converted into the liquid coolant of high pressure by releasing heat by sending the heat to the refrigerants.

The liquid coolant is low pressure from the expansion valve.