20 # -70 # (-M / G / A) Hlau Hlau Hlau Hlau Qws

Tus nqi lag luam ntawm cov roj carbon hlau hlau hlau hlau hlau hlau hlau tau cuam tshuam los ntawm ntau yam, cov nqi ntau lawm, kev thov lag luam thiab khoom siv, thiab lwm yam.

Tsawg zog zog yuav tsum tau ua: yog tias cov khoom siv uas xav tau tsuas yog cov khoom siv cov khoom me me, tsis tas li cov roj hlau zoo nkauj, 20 # cov roj carbon hlau loj heev yog qhov haum dua.

Kev siab tawv thiab cov kev yuav tsum tau ua kom muaj kev tiv thaiv lub tsheb loj uas tsis muaj kev tiv thaiv lub tsheb, lawv yuav tsum muaj cov pas nrig me me, yog tias, 20 # steel hlau hlau yog qhov kev xaiv zoo dua.

Tsawg cov tawv me me thiab cov kev xav tau yooj yim: rau qee cov cuab yeej lossis cov khoom siv ua kom ruaj khov, xws li cov ntaub ntawv, thiab lwm yam.

Xaiv raws li kev ua haujlwm:

Xav Txog Tus Nqi Them Nqi

Txo tus nqi xaiv: Feem ntau hais lus, cov pa roj carbon hlau zoo tshaj plaws yog feem ntau qis dua li ntawm 70 # steel hlau xaim vim nws cov txheej txheem yooj yim thiab cov txheej txheem ntau lawm.

Qhov kev ua tau zoo thiab xav txog tus nqi: yog tias cov kev xav tau ntawm cov khoom siv uas muaj siab dua, nws yog qhov tsim nyog los ntawm kev pom ntawm kev ua tau zoo thiab kev pabcuam lub neej.

Xaiv raws li kev siv kev pab:

Kev kub siab lossis qhov kub thiab kub ib puag ncig thiab lub zog siab thiab ruaj khov vim tias nws tseem tuaj yeem tswj hwm qee yam kub.

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