单项选择题
A.1.5~1.8m B.1.4~1.8m C.1.5~2m D.1.4~1.6m
A.2mm B.3mm C.4mm D.5mm
A.热水管应在冷水管左侧 B.热水管应在冷水管右侧 C.热水管应在冷水管上侧 D.热水管应在冷水管下侧
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