Lub tsev kawm ntawv siab ntawm cov tub ntxhais kawm niaj hnub no tsis yog siab heev, thiab qhov hnyav ntawm cov tub ntxhais kawm lub hnab trolley tau hnyav dua thiab hnyav dua vim muaj ntau yam haujlwm ua tom tsev, tshwj xeeb tshaj yog rau cov menyuam kawm ntawv theem pib, lawv cov hnab ntawv hauv t......
Nyeem ntxivCov me nyuam lub hnab ev ntawv yog qhov tsim nyog rau txhua tus menyuam mus kawm ntawv, vim tias tus menyuam nyob rau theem ntawm lub cev ntev, kev xaiv lub hnab ev ntawv cuam tshuam ncaj qha rau tus menyuam noj qab haus huv, yog li kev xaiv cov menyuam lub hnab ev ntawv tseem ceeb heev.
Nyeem ntxiv