In the sentence “In some designs the cylinder oil is timed so that the oil injects only on the piston ring belt, the "piston ring belt" means （）.
What are two characteristics of dual-ring interconnect in SONET networks? （）(Choose two.)
The purpose of the deck seal in an inert gas system is to prevent（）.
The piston ring grooves for a standard engine are （）
The piston rings are manufactured with a diameter （） the bore of the cylinder.
In order to avoid misconnections due to a failed node in a Bidirectional Line Switched Ring (BLSR), Alarm Indication Signals (AISs) are sent on every channel normally terminating in that node. What is the name of this process?（）
A condition contributing to diesel engine piston rings sticking in the ring grooves, is insufficient ring clearance at the ring（） Ⅰ.gap Ⅱ.side
In order to keep the oil film on the cylinder liner during the running-in period, the piston rings are slightly rounded（）
Around the combustion chamber, all the main components are bore cooled to give low strains and the smallest, circumferentially symmetric deformations for good sealing between piston rings and liner（）
The film of oil between the rings and the liner is not only essential for the lubrication but also （） achieving a gas seal.
Click the Exhibit button. Within an ONS 15454, you are provisioning a circuit on an unprotected UPSR ring. In the exhibit, which two must you configure?（） (Choose two.)https://assets.asklib.com/images/image2/2018080113444978502.jpg
The sealing function of the piston ring is brought about by the gas pressure above and behind the piston ring, which forces it （） against the bottom of the ring groove, and （） against the cylinder wall.
The cast iron（）for the cross-head are attached to the top section and seal off the crankcase.
A bright shiny appearance of the sealing surfaces on diesel engine compression rings indicates（）
When inspecting piston rings through the ports of a two-stroke/cycle diesel engine, black areas on the sealing surfaces are the result of （）
The main advantage of improved Simplex tailshaft seal are（）
Sealing in pump shaft is achieved by means of the （）.
Which of the following are components of a mechanical seal? （） (1) stationary ring (2) rotational ring (3) packing (4)spring
7.Please remember to keep the medicine in a sealed container.
In western culture, wedding rings are worn on right hand.( )
Generally speaking, Chinese characters can be classified into four styles, which are the seal script, the cursive script，the official script，the regular script.
Black areas on the sealing surfaces of piston rings indicate＿.
—Are you sure Mr Bush is at home？ He might still be in his office—Let's ring the_____.
Click the Exhibit button. Within an ONS 15454, you are provisioning a circuit on an unprotected UPSR ring. In the exhibit, which two must you configure？（） （Choose two.)
