- two-pipe heating system
- 双管: double-barrelled
- 采暖系统: heating system
- 单管采暖系统: one(single)-pipe heating system
- 微管采暖系统: micro-bore heating system; micro-boreheatingsystem; microbore system
- 垂直单管采暖系统: vertical on(single) pipe heating system; vertical one-pipe heating system
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