自己动手做太阳能热水器
●Alwayswearsafetygoggleswhensoldering.
●Solderinggetshot,wearsomeglovestoprotectyourhands.
●Becarefulwhenworkingatheights.Alwayshavesomeonehelpingyouincase
youfallandneedmedicalattention.
●Alwaysuselead-freesolderandrosinfluxforplumbingprojects.
●Alwaysu
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