直角地

Study on the Analysis of the Skidding Production Optimization Selection in Southern Collective Forest Regions;2. Study on the Reversal Direction Arisen When 50 Crawler Is Skidding at Steep Slopes;3. Skidding method can be determined by production efficiency and ecological environment.

介绍了目前国内外生态型伐区集材概况及类型，较详细地分析了6种生态型伐区集材模式的优缺点及适用条件，指出中国山地伐区应广泛推广直角横向集材和双向循环索道集材方式。

Forequarters nThe shoulders are well laid back at an angle of approximately 45; a line drawn from the highest point of the shoulder blade to the forward point of articulation approximates a right angle with a line from the forward point of articulation to the point of the elbow.

完整的齿系最为理想。nn 颈部 n 颈部的长度与身躯比例恰当，结实而略拱，平顺地与肩部结合。nn 前躯 n 肩部向后倾斜，角度约45度；从肩胛最高点向前，到肩胛与前臂的结合点所形成的直线，与前臂从与肩胛结合点向下，延伸到肘部的直线，正好呈清晰的直角。

The man was of fine figure,swarthy,and stern in aspect;and he showed in profile a facial angle so slightly inclined as to be almost perpendicular.

男子身材魁梧，黑黝黝，严肃地样子，从侧面观擦，他的脸上线条僵硬，几乎成直角。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。