Homeliness, Yam cuab yeej thiab khoom
Ntwav txhuam ntoo: labeling thiab kev siv cov
Nyob rau hauv hais lus ntwav txhuam ntoo feem ntau hu ua lub "ntwav txhuam ntoo" los yog "daim tawv nqaij."
Nws muaj ib daim ntawv los yog ntaub puag coated nrog ib tug txheej ntawm abrasive khoom.
Cov ancient Suav nyob rau hauv lub xyoo pua 13th nrog kev pab los ntawm ib tug nplaum raws li nyob rau hauv cov hmoov txhuv nplej daig rau parchment cog noob, finely av xuab zeb thiab zoo li.
Cov tsab ntawm tus sanding ntawv yog suav tias yog ib tug "iav ntawv" vim hais tias siv rau nws raug feeb iav hais.
Koj yuav tsum paub hais tias grain ntwav txhuam ntoo thiab muaj ib qho ntawm nws lub ntsiab yam ntxwv.
Conventionally, daim ntawv muab faib mus rau hauv pab pawg: ntxhib, medium thiab me me grain ntawv.
Lis loj txiav txim hom kev ua hauj lwm rau cov uas yog ntwav txhuam ntoo. Labeling yuav pab nws xaiv.
Emery tau ua hauj lwm rau qhuav thiab ntub dej kev kho mob ntawm chaw ntawm tag nrho cov hom putty.
Rau txawv hom ntawm kev ua hauj lwm siv los paub qhov txawv ntawm grain thiab lub hauv paus ntawm ntwav txhuam ntoo. Npav hauv ib lub daim ntawv.
zeb ntwav txhuam ntoo
| Laus Standard | tshiab Standard |
| M40 ( «nulevka") | P400 |
| M-50 | P320 |
| 5-H | P240 |
| 8-H | P180 |
| 10-H | P150 |
| 12-H | P120 |
| 16-H | P100 |
| 20-H | P80 |
| 32-H | P50 |
| 50-H | P36 |
| 63-H | P30 |
| 80-H | P24 |
| 100-H | P20 |
N - labeling ntawm domestic khoom (laus).
P - labeling ntawm mas cov khoom thiab tshiab labeling ntawm domestic khoom.
Manufacturers uas tsim cov khoom rau export, siv ib zaug xwb lub ntiaj teb no tus qauv los ntawm grain loj.
Nyob rau hauv ib co xeev ntawm lub Union collapsed ntwav txhuam ntoo, npav lub tiav lawm cov khoom Emery ntau lawm yog nqa tawm raws li GOST (laus).
Cov tib yam yog tshwm sim nyob rau hauv Canada, Tuam Tshoj, lub US thiab Nyiv, qhov twg lub domestic kev ua lag luam nyiam nws tus kheej lub cim.
European Standard (GOST tshiab) implies ib qho kev nce ntawm qhov tseem ceeb uas zuj zus lawm grain loj. Sib txawv kiag li nyob rau hauv cov teb chaws yog cim nrog ntwav txhuam ntoo.
Standard, rau Piv txwv li, tsim kom cov qhov tseem ceeb yog, on qhov tsis tooj, decreases nrog zuj zus lawm grain loj.
Cov kev txawv no yuav tsis tau ignored thaum nriav abrasive cov khoom nyob rau hauv ib ncig ntawm lub qub Soviet Union, raws li Qhov no txawv tej zaum yuav raug nyob rau hauv lub tshaaj ntawm qhov tsis ncaj ncees khoom.
Nws yuav tsum tau muab sau tseg tias imported ntawv yog feem ntau muag nyob rau hauv cov khoom, thiab domestic - nyob rau hauv yob, thiab muag nws cov 'meter'.
Yog hais tias daim ntawv no yog siv nyob rau hauv lub neej txhua hnub, nws yog tsis tsim nyog rau nco ntsoov cim. Nws yog tsuas tsim nyog los paub hais tias cov laus labeling yog nrog tsab ntawv H tom qab tus xov tooj, thiab cov tshiab nrog tsab ntawv P ua ntej tus xov tooj.
Nyob rau hauv rov qab sab ntawm daim ntawv, nws muaj lwm cov designations. Lawv yuav tau txais ntxiv cov lus qhia txog lub ntwav txhuam ntoo: nws yog raws li, lub tshuab ntau lawm, cov hom ntawm abrasive grain khoom, hom nplaum, thiab lwm yam ...
Tam sim no uas koj paub tias dab tsi lub ntwav txhuam ntoo. Npav? Nrog nws, koj, heev, to taub. Nws tseem mus xav tag nrho ib tug qab ntxiag thiab ua hauj lwm.
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