Xov Xwm Kev Lag Luam
-
Qhov txawv ntawm daim ntawv txhuas thiab kauj yog dab tsi?
Daim ntawv txhuas thiab kauj yog ob hom khoom txhuas sib txawv, txhua tus muaj nws cov yam ntxwv thiab kev siv tshwj xeeb. Kev nkag siab txog qhov sib txawv ntawm ob qho no tuaj yeem pab cov neeg siv xaiv tau zoo dua thaum nws los txog rau lawv cov kev xav tau tshwj xeeb. Daim Ntawv Txhuas Txhuas ...Nyeem ntxiv -
Txog tooj liab
Tooj liab yog ib qho ntawm cov hlau thaum ub uas tib neeg tau tshawb pom thiab siv, xim av-liab, qhov hnyav tshwj xeeb 8.89, qhov taw tes yaj 1083.4 ℃. Tooj liab thiab nws cov hlau sib xyaw tau siv dav vim lawv cov hluav taws xob zoo thiab cov thermal conductivity, tiv taus corrosion muaj zog, yooj yim p ...Nyeem ntxiv -
Kev tshuaj xyuas txog yav tom ntej ntawm tus nqi tooj liab
Tooj liab tab tom yuav nce nqi ntau tshaj plaws txhua hli txij li lub Plaub Hlis 2021 vim tias cov tub ua lag luam twv tias Tuam Tshoj yuav tso tseg nws txoj cai xoom coronavirus, uas yuav ua rau muaj kev thov ntau ntxiv. Tooj liab rau lub Peb Hlis xa khoom tau nce 3.6% mus rau $ 3.76 ib phaus, lossis $ 8,274 ib metric ton, ntawm Comex division ntawm New ...Nyeem ntxiv
