do not bead
不要低头
以上为机器翻译结果，长、整句建议使用 人工翻译 。
This welding backing is used with all one-side processes. Especially for those which do not demand back bead cleaning.
本衬垫可用于各种单面焊接工艺的位置，特别适用于不一定要求封底焊道的场合。
youdao
Hardware specs and innovative applications aside, Apple probably still has a stronger bead on who we are by not over-specifying what it can do for us.
FORBES: Galaxy S4 Contrasts Samsung's Maximalism With Apple's Minimalism
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