The appearance of prestressed concrete poles is ______

One way slabs may be supported across the entire width of the slab by means of ______

In stage construction, the main function of the longitudinal prestress is to prevent ______

Long spans exceeding 30m necessitate is?

In monolyte construction the manufacturing process consists of pouring concrete under high frequency of ______

The diagram of prestressed concrete pipes of circumferential prestressing may be with or without ______

The base slab forming the floor or tank is generally made of ______

An ingenious method of casting spherical shells at the centre with conical shape was adopted by ______