Txoj moo

API Tuam Tshoj yog lub platform loj rau kev ncig sab hauv ntawm Tuam Tshoj cov chaw muag tshuaj thiab qhov chaw yug ntawm lub ntiaj teb kev lag luam kws tshuaj, suav nrog ntau dua 50, 000 hom apis ...

Thaum Lub Kaum Hli 24, Red Star Capital Bureau tau kawm tias 2023 Tuam Tshoj Pharmaceutical Industry Development Conference yuav muaj nyob rau hauv Beijing txij lub Kaum Ib Hlis 17 txog 19. Lub roo...

Cov khoom tsim los ntawm kev ua liaj ua teb raw cov ntaub ntawv yog ib qho nruab nrab nruab nrab uas muab ob los yog ntau yam khoom ua ke. Hauv cov tshuaj tua kab, nws tuaj yeem nkag siab tias yog ...

Raws li kev cai thoob ntiaj teb kev sib koom ua ke, tsab ntawv "R" sawv cev rau cov tub yees, thiab cov khoom sib xyaw ntawm cov lej thiab cov ntawv hauv qab no tau qhia meej meej hauv GB7778-1987....

Muaj ntau ntau hom raws li lawv muaj pes tsawg leeg. (1) Inorganic compounds. Dej, ammonia, carbon dioxide, thiab lwm yam. (2) Ib tug derivative ntawm saturated hydrocarbons, feem ntau hu ua Freon....

Tus naj npawb ntawm cov tub yees siv thaum lub sijhawm tshaj tawm tau mus txog 70-80 thiab nce ntxiv. Tab sis tsuas muaj ntau tshaj kaum hom siv nyob rau hauv kev lag luam khoom noj khoom haus thia...

(1) Muaj cov khoom siv hluav taws xob zoo heev kom ua tiav lub voj voog ua haujlwm siab thaum ua haujlwm nyob rau hauv qhov ntsuas kub. Cov kev cai tshwj xeeb yog: qhov tseem ceeb ntawm qhov kub th...

Cov tub yees code yog thawj zaug tau teev tseg rau Freon, thiab thaum lub sijhawm tshaj tawm, nws yog tus qauv tsim los ntawm American Heating and Refrigeration Engineering Association hauv 1967 (A...

Nyob rau xyoo 1805, O. Evans tau tsim lub tswv yim ntawm kev siv cov kua dej tsis haum rau hauv lub voj voog kaw kom khov dej rau hauv dej khov. Nws piav txog qhov system no, uas evaporates ether n...

Cov kua dej ua haujlwm uas ua tiav lub voj voog thermal hauv lub tub yees. Nws nqus cua sov los ntawm cov khoom txias ntawm qhov kub thiab txias thiab tom qab ntawd hloov mus rau cov dej txias los ...

Organic compounds nyob rau hauv uas fatty hydrocarbon pawg yog txuas ncaj qha mus rau hydroxyl pawg nyob rau hauv molecules belongs rau cawv. Raws li tus naj npawb ntawm hydroxyl pawg muaj nyob rau...

Petroleum yog ib qho kev sib xyaw ntawm ntau yam hydrocarbons uas raug faib ua feem los tsim cov khoom uas muaj qhov sib txawv ntawm qhov kub kub. Raws li lub boiling ntau..