Sémér: Bina pantaraning révisi
Kontén kaapus Kontén kawewehin
Carik 5:
Sémér malakar antuk kayu sampun kauningan saking daweg [[Neolitikum]] utawi zaman batu muda, Contonyané ring Ostrov, [[Républik Céko]] warsa 5265 SM<ref>{{Cite journal|last=Rybníček|first=Michal|last2=Kočár|first2=Petr|last3=Muigg|first3=Bernhard|last4=Peška|first4=Jaroslav|last5=Sedláček|first5=Radko|last6=Tegel|first6=Willy|last7=Kolář|first7=Tomáš|date=2020-03-01|title=World's oldest dendrochronologically dated archaeological wood construction|url=http://www.sciencedirect.com/science/article/pii/S0305440320300066|journal=Journal of Archaeological Science|language=en|volume=115|pages=105082|doi=10.1016/j.jas.2020.105082|issn=0305-4403}}</ref>. Bukti sémér toya sané pinih simalu katemuin ring [[Cina]]. Ring cakepan Yi Jing kasurat sapunapi krama cina kuna ngemban sémér tur nyage klebutannyane<ref name=":0">{{Cite web|url=https://www.csegrecorder.com/articles/view/ancient-chinese-drilling|title=Ancient Chinese Drilling|website=CSEG RECORDER Magazine|language=en-us|access-date=2020-04-07}}</ref>.
Ring mesir kuna, Syaduf
[[Berkas:Up the Nile, and home again. A handbook for travellers and a travel-book for the library. (1862) (14577560547).jpg|jmpl|290x290px|Sakia ring mesir kuna.]]
Sémér sané madué tatujon lianan kakaryanin sesampun sémér toya. Sémér [[tasik]] sané kapartama kapainget wantah ring provinsi Sichuan, Cina 2,250 warsa dumunan<ref name=":0" />. Sémér minyak utawi lengis sané kapertama taler katemuin ring cina duk warsa 347 M. Sémér punika madué kadaleman kirang langkung 240 meter tur kakeduk ngagge matan bor sané kategul ring [[tiing]]<ref>{{Cite web|url=https://www.astm.org/COMMIT/D02/to1899_index.html|title=ASTM International - Standards Worldwide|website=www.astm.org|access-date=2020-04-07}}</ref>. Minyake punika kaagen ngaryaning tasik saking toya tasik utawi Brine.
Carik 16:
=== Sémér Bor ===
[[Berkas:Groundwater Contamination SW Asia Sm.png|jmpl|290x290px|Pinakit waterborne mrasidanyang kalalahin saking WC ke sémér.]]
Sémér Bor kakeduk ngange mesin bor
== Kontaminasi ==
Carik 22:
=== ''Patogen'' ===
Makehan [[bakteri]], [[virus]], [[parasit]] miwah [[oong]] sané ngregedin sémér masumber saking tai utawi feses manusa
=== ''Kontaminasi kimia'' ===
Kontaminasi kimia wantah pikobet sané akeh katemuin ring toya tanah. Nitrat saking limbah WC utawi [[rabuk]] wantah pikobet buat anak alit
== Pustaka ==
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