retaining mechanism造句

• They lack water-retaining mechanisms and are therefore very sensitive to humidity variations of their environment.
• The rod's retaining mechanism was problematic and did not work well until a key was added to the locking spring.
• The Model 1888 included an improved retaining mechanism, as the Model 1880's retaining mechanism had proved to be problematic.
• The Model 1888 included an improved retaining mechanism, as the Model 1880's retaining mechanism had proved to be problematic.
• This model had not been successful, due to problems with the bayonet / ramrod retaining mechanism and poor ballistic performance of the weapon due to the heavy forward mounting mechanism.
• The retaining mechanism has been a matter of debate, but there exists strong evidence against a double displacement mechanism ( which would cause two inversions about the anomeric carbon for a net retention of stereochemistry ) or a dissociative mechanism ( a prevalent variant of which was known as SNi ).