Correct

梯次

/ tī cì /
Strokes

Example

As a Noun

echelon

1
Chǎnpǐn
产品
jiégòu
结构
梯次
合理
  

Product structure is rationally ranked.

As a Noun

line of succession

2
梯次
pèibèi
配备
gàn
干部

organize new government officials to replace old ones; officials in line to succeed