Ntsuas qhov tseeb txog kev loj hlob ntawm cov tub kawm ntawv yau tshaj plaws, Nikolai Alexandrovich tau pib kawm pib los ntawm ib lub tsev kawm ntawv qib qis, uas yog, nrog lub tsev qiv ntawv. Nws yog khub ntawm cov tsiaj ntawv thiab cov ntawv cim suab uas tau muab tso rau ntawm qhov ntsuas thiab cov suab lus ntawm Zaitsev. Cubes sib txawv me me, hnyav, xim thiab suab, muaj ntau yam pub rau tus me nyuam kom tau ib daim duab uas muaj suab nrov. Ib txhij nrog ntsuas, Zaitsev cov ntawv nyeem tau siv, qhov twg tag nrho tib lub suab (chaw khaws khoom) tso rau. Ntawm lawv tus menyuam kawm paub los ua cov lus thiab hu lawv.
Tswv yim rau kev siv lub suab rau nyeem ntawv Zaitsev
Thaum xub thawj siab ib muag nws yuav zoo li tias cov ntxhuav tsis tseem ceeb npaum li cov ntsuas. Tab sis, raws li NA Zaitsev nws tus kheej, tsuas yog ib txoj siv ntawm lub rooj nrog lub suab (warehouses) thiab qhov ntsuas lawv tus kheej yuav muab qhov ceev thiab zoo tshwm sim. Piv txwv, cov me nyuam 4-6 xyoos kawm nyeem ntawv tom qab 3-4 zaj lus qhia. Yog tias qhov kev cob qhia ua nyob rau hauv pawg, cov ntxhuav raug dai siab, kom tsis txhob muaj kev sib cav ntawm lub cev thiab qhov muag. Hauv tsev, rau ib los yog ob tug me nyuam, nws yog qhov zoo dua rau lawv tso rau hauv ib qho chaw uas cov me nyuam siv sij hawm ntau kawg nkaus.
Nyob rau hauv cov ntxhuav yog tso rau hauv lub suab lus ntawm lub tshuab "voiced-deaf" thiab "soft-hard", nrog rau cov cim, kev ua zauv thiab cov duab. Yog li, txoj kev kawm no yuav tsum kawm tsis tas yuav sau thiab nyeem ntawv, tab sis kuj yog rau tus as khauj, muab ib lub tswv yim ntawm cov lus sib sau ntawm tus xov tooj, kev khiav hauj lwm ntawm kev sib ntxiv thiab sib faib.
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