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| 蒸汽管路、排气管路和泄水管路的管子和阀门护层隔热材料 | |||
| lagging material for piping and valve of steam line, exhaust line and drain line: 1 phrase in 1 subject |
| Technology | 1 |
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| 蒸汽管路、排气管路和泄水管路的管子和阀门护层隔热材料 | |||
| lagging material for piping and valve of steam line, exhaust line and drain line: 1 phrase in 1 subject |
| Technology | 1 |