| 摘要 |
A valve box, a valve control device, an assembly thereof and a method are provided for accessing an underground valve and indicating presence and position of the underground valve. The valve box includes a support member having a tubular section; and a resilient tubular member telescopable slidably into the tubular section of the support member. An upper end of the resilient tubular member is extendable above the ground. Various elements are disclosed for stiffening the tubular member against deformation due to forces applied to it. The valve control device comprises a control rod having one end attachable to the underground valve and a control key including a key head, a key handle and a key stem. The key head has a cone-shaped cavity and a recess portion at the top of the cavity, the recess portion being dimensioned to engage a projection at the other end of the control rod.
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