He clearly USES a high elbow anchor position on his left arm.
他的左臂很明确使用了高肘。
2
The anchor-arm static-pressure pile can be used not only in buildings' foundation engineering but also in the reinforcement construction of large bridge pile foundation.
锚杆静压桩不仅能在建筑基础工程中应用，而且能在大型桥梁桩基加固补强施工中应用。
3
This paper introduces the design, application and construction techniques of anchor-arm static-pressure pile in the reinforcement of bridge's boring pile foundation.