大家在查： 24.5 see necessity 数词 examinees good discipline 养花小时钟按自个儿 writting laurel tree

back ring

美英

un.保护垫圈；环形垫

back ring

back ring

back ring

1

The paper thinks practicing shooting should be focused on the back ring as the aiming point .

据此认为，进行篮球投篮练习时应以篮圈后沿作为瞄准点更为有利。

2

The Cause and Countermeasure of Uncompleted Burning of Fuel to Back Ring Forming on Precalciner Kiln

燃料不完全燃烧对预分解窑后结圈的形成影响与对策

3

the metal back ring is fixedly matched with the metal sheet ;

所述金属背环与所述金属片固定配合；

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