The space that residential building narrowed the mankind lives, make resist safety of chill, sponsorial body had reliable safeguard.

住宅建筑缩小了人类生间，使抵御风寒、保证人身安全有了靠保障。

Stem from the need of environmental protection, special attention introduces a few high-grade brand the cupreous ability that exceeds small lead content is made, sponsorial system is healthy.

出于环保需要，少数高档常注重采用超低铅含量铜材制造，保证人体健康。