| 65 | Water softening equipment automatic valve replacement work | Hotel Lotte Co., Ltd. Lotte Resort Buyeo | Hotel Lotte Co., Ltd. Lotte Resort Buyeo | 2019.10 |
| 94 | Sewage treatment plant discharge pump installation | Jeonbuk Gunsan Medical Center | Jeonbuk Gunsan Medical Center | 2020. 05 |
| 228 | Oil mist dust collector installation work (200㎥/min*5 sets) | Mando Mexico Corporation | Mando Mexico Co., Ltd. | 2023.04 |
| 81 | Autoclave piping work | Aone Construction Co., Ltd. | Aone Construction Co., Ltd. | 2020. 01 |
| 160 | Okgon Village Sewage Treatment Plant Repair Work | Techcross Environmental Service Co., Ltd. | Okgon Village Sewage Treatment Plant | 2021.12 |
| 64 | Okgu small-scale treatment plant piping repair work | Techcross Environmental Service Co., Ltd. | Techcross Environmental Service Co., Ltd. | 2019.10 |
| 74 | Okseo Chongin Facility Filter No. 4 Repair Work | Environmental Facility Management Co., Ltd. | Okseo Sewage Treatment Plant | 2019. 12 |
| 13 | Melting furnace duct installation work | Kallink | Kallink | 2015. 01 |
| 244 | Centrifugal force dust collector adhesion and installation work | Minseong Industry | Minseong Industry | 2024.01 |
| 130 | Centrifugal force dust collection equipment installation work (180㎥/min) | Good wood | Good wood | 2021.04 |
| 129 | Centrifugal force dust collection equipment installation work (250㎥/min) | Taejin Wood Co., Ltd. | Taejin Wood Co., Ltd. | 2021.04 |
| 167 | Centrifugal force dust collector installation work | Sunil Agricultural Corporation Co., Ltd. | Sunil Agricultural Corporation Co., Ltd. | 2022.02 |
| 128 | Centrifugal dust collector installation work (250㎥/min) | Baeksan Wood | Baeksan Wood | 2021.03 |
| 127 | Centrifugal dust collector installation work (250㎥/min) | Haesung Timber Co., Ltd. | Haesung Timber Co., Ltd. | 2021.03 |
| 126 | Centrifugal force dust collector installation work (300㎥/min) | Taesung Wood Co., Ltd. | Taesung Wood Co., Ltd. | 2021.03 |
| 125 | Centrifugal dust collector installation work (500㎥/min) | DS Timber Co., Ltd. | DS Timber Co., Ltd. | 2021.03 |
| 135 | Centrifugal force dust collection facility installation work (200㎥/min) | Seung Oud | Seung Oud | 2021.05 |
| 12 | Flow meter installation work | Securit Co., Ltd. Gunsan | Securit Co., Ltd. | 2015. 11 |
| 22 | Inflow flow meter installation work | Securit Co., Ltd. Gunsan | Securit Co., Ltd. | 2015. 08 |
| 76 | E-Land Park Jirisan Namwon micro filter installation work | E-Land Park Co., Ltd. Kensington Resort Jirisan Namwon | E-Land Park Co., Ltd. Jirisan Namwon | 2019. 12 |
| 106 | Production and installation of loading table | Shinhwa Environmental Industry | Shinhwa Environmental Industry | 2020.07 |
| 58 | Installation of automatic polymer dissolution device in the dehydrator room of the second treatment facility | HiNTech Co., Ltd. | Guri Sewage Treatment Plant | 2019. 08 |
| 229 | Partial replacement of condensate piping in assembly plant, replacement of industrial header in starting room, steam piping insulation in body shop | Tata Daewoo Commercial Vehicle Co., Ltd. | Tata Daewoo Commercial Vehicle Co., Ltd. | 2023.04 |
| 238 | Replacement of relay pump deodorizer filter material | Techcross Environmental Service Co., Ltd. | Techcross Environmental Service Co., Ltd. | 2023.11 |
| 144 | Expanded separation membrane pretreatment equipment screw canvas air reduction shaft repair and piping improvement repair | Environmental Facility Management Co., Ltd. | Environmental Facility Management Co., Ltd. | 2021.07 |
| 56 | Groundwater water treatment system installation work | GNS Engineering | Pocheon military unit | 2019. 05 |
| 80 | Dust collector diaphragm valve replacement work | Sunil Co., Ltd. | Korea Securit | 2020. 01 |
| 116 | Dust collector manufacturing and installation work | Cheongsong E&T Co., Ltd. | Cheongsong E&T Co., Ltd. | 2020.12 |
| 163 | Dust collector fan balancing work | Iljin Steel Co., Ltd. | Iljin Steel Co., Ltd. | 2022.01 |
| 30 | Dust collector relocation and DUCT installation work | Dasan Qigong | Dasan Qigong | 2015.12 |
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