Which of the following are the two common ways of applying the pit fields method?
A、Ditch-shaped pit field.
B、Net-shaped pit field.
C、Ridge-shaped pit field.
D、Alternating pit field.
发布时间:2025-07-01 04:53:20
A、Ditch-shaped pit field.
B、Net-shaped pit field.
C、Ridge-shaped pit field.
D、Alternating pit field.