Qhov twg yog cov ntawv siv?

Cov txheej txheem:

Qhov twg yog cov ntawv siv?
Qhov twg yog cov ntawv siv?
Anonim

Notches feem ntau yog siv rau hauv cov khoom siv cuam tshuam kev ntsuasqhov chaw morphological tawg ntawm lub hauv paus tswj hwm yog tsim nyog los ua kom tiav tus yam ntxwv ntawm kev puas tsuaj ntawm cov khoom. Qhov ntau tshaj plaws yog Charpy impact test, uas siv lub pendulum rauj (striker) los ntaus ib tug kab rov tav notched specimen.

Dab tsi yog siv rau?

Pattern notches yog cov cim me me ua rau ntawm tus qauv kom ntseeg tau tias ib qho qauv yuav phim rau tus qauv ntawm ib sab. Lawv tuaj yeem siv tau los qhia tias tus nqi ntawm seam nyiaj yog dab tsi, thiab tseem tuaj yeem siv los ua cov cim raws lub seam kom paub tseeb tias ob daim ntaub yuav tuaj ua ke kom raug thaum sewn.

Koj tso qhov twg?

Muab cov ntawv tso rau hauv tib qhov chaw ntawm cov qauv rov qab, kom thaum koj koom nrog cov ntawv, cov ntawv txiav yuav sib phim. Piv txwv li, thaum muab ib qho thais rau ntawm sab seam ntawm lub nraub qaum qauv, kuv yuav muab tso rau hauv tib txoj hauj lwm raws li lub hauv ntej - uas yog nyob rau sab saum toj ntawm seam.

Dab tsi yog qhov tsis zoo?

Ib qho me me yog txiav me me lossis nick hauv qee yam. Neej neeg ua dab tsi kom taug qab yam. Yog tias koj tau pom me ntsis U-puab lossis V-shaped txiav rau hauv ib yam dab tsi, koj tau pom qhov thais. Hauv tsev lojcuj, cov neeg ua phem ua phem yuav ua cov ntawv rau ntawm phab ntsa kom taug qab ntev npaum li cas lawv tau nyob ntawd.

Kuv puas txiav cov ntawv sau rau ntawm tus qauv?

Tsuas txiav tawm sab nraud ua v zoo. Yog lub thaib tebkoj cov ntsiab lus hauv, ces cia li txiav tawm ntawm nws. Yog tias koj muaj ob txoj hlua khi koj tuaj yeem txiav 2 qhov sib cais v notches los yog txiav hla ua ib thooj. Tsuav koj ua raws li txoj kev koj siv, koj cov khoom yuav sib npaug.

Pom zoo:

Nthuav cov khoom
Thaum twg peb lub pas dej tauv tsim?
Nyeem ntxiv

Thaum twg peb lub pas dej tauv tsim?

Peb lub Gorges Dam yog lub pas dej loj loj uas hla tus Dej Yangtze los ntawm lub nroog Sandouping, hauv Yiling District, Yichang, Hubei xeev, nruab nrab Tuam Tshoj, nqes ntawm peb Gorges. Peb Gorges Dam tau ua lub chaw nres tsheb loj tshaj plaws hauv ntiaj teb raws li kev teeb tsa muaj peev xwm txij li xyoo 2012.

Puas yog acetamide muaj ntxhiab tsw?
Nyeem ntxiv

Puas yog acetamide muaj ntxhiab tsw?

Cov tshuaj acetamide yog cov tshuaj acetic acid-derived uas tau txheeb pom tias yog tsw zoo li ammonia lossis vinegar. Nws tseem yuav cling rau qhov chaw uas musculus nyob rau hauv pw tsaug zog thiab yuav tau txais zaub mov scrounge. Vim li cas acetamide yaj hauv dej?

Kuv puas tau mob plawv?
Nyeem ntxiv

Kuv puas tau mob plawv?

Feem ntau, lawv tshwm sim los ntawm kev ntxhov siab thiab kev ntxhov siab, lossis vim tias koj tau muaj caffeine, nicotine, lossis cawv ntau dhau lawm. Lawv kuj tuaj yeem tshwm sim thaum koj cev xeeb tub. Muaj tsawg zaus, palpitations tuaj yeem yog ib qho cim ntawm lub plawv mob hnyav dua.